{{redirect|Gotama||Gautama Buddha}} {{short description|Sanskrit text of the Nyaya school of Hindu philosophy}} {{Italic title}} {{Use Indian English|date=January 2020}} {{Use dmy dates|date=January 2021}} [[File:4 Pramanas, epistemology according to ancient Nyayasutras.svg|thumb|260px|The means to correct knowledge, according to ancient Nyayasutras]] {{Hindu philosophy}} {{Hindu scriptures and texts|Other}} The '''''Nyāya Sūtras''''' ([[Sanskrit]]: न्यायसूत्र) is an ancient Indian [[Sanskrit]] text composed by '''{{IAST|Akṣapāda Gautama}}''' and the foundational text of the [[Nyaya]] school of [[Hindu philosophy]].Klaus K Klostermaier (1998), A concise encyclopedia of Hinduism, Oneworld, {{ISBN|978-1851681754}}, page 129Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, pages vii, 33, 129 The date when the text was composed is unknown, but variously estimated between 6th century BCE and 2nd century CE.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 129B. K. Matilal "Perception. An Essay on Classical Indian Theories of Knowledge" (Oxford University Press, 1986), p. xiv. The biography of its author is unknown, and the text may have been composed by more than one author over a period of time. The text consists of five books, with two chapters in each book, with a cumulative total of 528 [[aphoristic]] [[sutra]]s about rules of reason, logic, epistemology and metaphysics.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, pages 127–136Ganganatha Jha (1999 Reprint), ''Nyaya-Sutras of Gautama'' (4 vols.), Motilal Banarsidass, {{ISBN|978-81-208-1264-2}}SC Vidyabhushan and NL Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}} The ''Nyāya Sūtras'' is a Hindu text,{{refn|group=note|[[Francis Xavier Clooney|Francis Clooney]] states, "Nyaya is the traditional school of Hindu logic. In the early centuries BCE the Nyaya logicians undertook the project of describing the world in a coherent rational fashion and without reliance on revelation or a commitment to any particular deity. Nyaya's primary text, the Nyaya Sutras of Gautama, can be read as a neutral analysis neither favoring nor opposing the idea of God".Francis X Clooney (2001), Hindu God, Christian God: How Reason Helps Break Down the Boundaries between Religions, Oxford University Press, {{ISBN|978-0199738724}}, page 18}} notable for focusing on knowledge and logic, and making no mention of Vedic rituals.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 129; Quote: "In focusing on knowledge and logic, Gautama's Sutras made no mention of Vedic ritual". The first book is structured as a general introduction and table of contents of sixteen categories of knowledge. Book two is about ''[[pramana]]'' (epistemology), book three is about ''prameya'' (the objects of knowledge), and the remaining books discuss the nature of knowledge. It set the foundation for the Nyaya tradition of the empirical theory of validity and truth, opposing uncritical appeals to intuition or scriptural authority.Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 3, 1–12 The ''Nyāya Sūtras'' cover a wide range of topics, including Tarka-Vidyā, the science of debate, or Vāda-Vidyā, the science of discussion.Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 191–199, 207–208 The ''Nyāya Sutras'' are related to but extend the [[Vaisheshika|{{IAST|Vaiśeṣika}}]] [[Epistemology|epistemological]] and [[Metaphysics|metaphysical]] system.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, pages 98, 103–104, 128 Later commentaries expanded, expounded, and discussed the Nyaya sutras. The earliest surviving commentaries are the ''Nyāyabhāṣya'' of [[Pakṣilasvāmin Vātsyāyana]] (5th–6th century CE), the ''Nyāyavārttika'' of [[Uddyotakāra]] (6th–7th century CE), [[Vācaspati Miśra]]'s ''Tātparyatīkā'' (9th century CE), [[Udayana]]'s ''Tātparyapariśuddhi'' (10th century CE), and [[Jayanta Bhatta|Jayanta]]'s ''Nyāyamañjarī'' (10th century CE).Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 239 ==Author and chronology== {{Asian philosophy sidebar}} The ''Nyaya-sutras'' is attributed to Gautama, who was at least the principal author. According to Karl Potter, this name has been a very common Indian name, and the author is also reverentially referred to as Gotama, Dirghatapas and Aksapada Gautama. Little is known about Gautama, or which century he lived in. Scholarly estimates, based on textual analysis, vary from the 6th century BCE, making him a contemporary of [[Gautama Buddha]] (Siddhartha Gautama) and [[Mahavira]], to as late as the 2nd century CE. Some scholars favor the theory that the cryptic text ''Nyaya-sutras'' was expanded over time by multiple authors, with the earliest layer from about mid-first millennium BCE that was composed by Gautama. The earliest layer is likely to be Books 1 and 5 of the text, while Books 3 and 4 may have been added last, but this is not certain. {{Quote| One may sum up the situation pretty safely by saying that we have not the vaguest idea who wrote the Nyayasutras or when he lived.|Karl Potter|The Encyclopedia of Indian PhilosophiesKarl Potter (2004), [https://books.google.com/books?id=Bo0FeYVcOmUC The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology], Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 220–221}} It is likely, states Jeaneane Fowler, that Nyaya and the science of reason stretch back into the Vedic era; they developed in the ancient Indian tradition that involved "dialectical tournaments, in the halls of kings and schools of Vedic philosophers", and Gautama was the one who distilled and systematized this pre-existing knowledge into [[sutra]]s, or aphoristic compilations called ''nyayasutras''.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, pages 128–129 The Nyaya school of Hinduism influenced all other schools of [[Hindu philosophy]], as well as Buddhism. Despite their differences, these scholars studied with each other and debated ideas, with Tibetan records suggesting that Buddhist scholars spent years residing with Hindu Nyaya scholars to master the art of reasoning and logic. This cooperation has enabled scholars to place the currently surviving version of the ''Nyayasutras'', to a [[terminus ante quem]] (completed before) date of about the 2nd century CE, because one of the most famous and established Buddhist scholars of that era, [[Nagarjuna]], explicitly states, "sutra 4.2.25 is addressed against the [[Madhyamaka|Madhyamika]] system" of Buddhism. Other ancient Buddhist texts confirm that the ''Nyayasutras'' existed before them, and the text is considered the primary text of the old Nyaya school of Hinduism.Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 221–223 ==Structure== {{Quote box |width=22em | bgcolor=#FFE0BB |align=right |salign = right |quote= Reality is truth (''prāma''), and what is true is so, irrespective of whether we know it is, or are aware of that truth. |source =— Akṣapada Gautama in ''[[Nyaya]] Sutra''Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 130}} The text is written in ''sutra'' genre. A ''sutra'' is a Sanskrit word that means "string, thread", and represents a condensed manual of knowledge of a specific field or school.Monier Williams, Sanskrit English Dictionary, Oxford University Press, Entry for [http://www.ibiblio.org/sripedia/ebooks/mw/1200/mw__1274.html ''Sutra''], page 1241Gavin Flood (1996), An Introduction to Hinduism, Cambridge University Press, {{ISBN|978-0521438780}}, pages 54–55 Each ''sutra'' is any short rule, like a theorem distilled into few words or syllables, around which "teachings of ritual, philosophy, grammar or any field of knowledge" can be woven.M Winternitz (2010 Reprint), A History of Indian Literature, Volume 1, Motilal Banarsidass, {{ISBN|978-8120802643}}, pages 249 Sutras were compiled to be remembered, used as reference and to help teach and transmit ideas from one generation to the next.{{cite book | last =White | first =David Gordon | year =2014 | title =The Yoga Sutra of Patanjali: A Biography | publisher =Princeton University Press |isbn= 978-0691143774|pages=194–195}} The Nyayasutra is divided into five books, each book subdivided into two chapters each. The structure of the text is, states Potter, a layout of ''ahnikas'' or lessons served into daily portions, each portion consisting of a number of ''sutras'' or [[aphorism]]s. The architecture of the text is also split and collated into ''prakaranas'' or topics, which later commentators such as Vatsyayana and Vacaspati Misra used to compose their [[bhasya]], ancient texts that have survived into the modern era. There are several surviving manuscripts of the Nyayasutras, with a slight difference in number of sutras, of which the ''Chowkhamba'' edition is often studied. {| class="wikitable" align=center style = " background: transparent; " |+ The structure of Nyayasutra |-style="text-align: center;" | width=80px style="background: #ffad66;" | Book | width=80px | Chapter | width=80px | Number of sutras | width= 450px | TopicsKarl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 222–238SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n3/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, pages i–v |-style="text-align: center;" | rowspan=2 style="background: #ffdd66;" | 1 | width=80px | 1 | width=80px | 41 | width= 450px style="text-align: left;" | Subject matter and statement of purpose of the text. Four reliable instruments of correct knowledge. Definitions. Nature of argument and nature of the process of valid proof. |-style="text-align: center;" | width=80px | 2 | width=80px | 20 | width= 450px style="text-align: left;" | How to analyze opposing views, presents its theory of five-membered arguments, correct conclusions are those where contradictions do not exist, theory of reasoning methods that are flawed, what is a quibble and how to avoid it. |-style="text-align: center;" | rowspan=2 style="background: #ffdd66;" | 2 | width=80px | 1 | width=80px | 69 | width= 450px style="text-align: left;" | Presents its theory of Doubt. Discusses epistemology, when perception, inference and comparison is unreliable and reliable. Theory that the reliability of testimony depends on the reliability of the source. Theory that the testimony in the Vedas are a source of knowledge and inconsistencies are either defects or choices in the text, the best way to understand the Vedas is to divide it into three: injunction, descriptions and reinculcations. |-style="text-align: center;" | width=80px | 2 | width=80px | 71 | width= 450px style="text-align: left;" | Instruments of knowledge are fourfold, Confusion caused by presumption and prejudice, Sound is noneternal theory, Theory of three meaning of words (vyakti, akrti and jati) |-style="text-align: center;" | rowspan=2 style="background: #ffdd66;" | 3 | width=80px | 1 | width=80px | 73 | width= 450px style="text-align: left;" | presents its theory of body, followed by theory of sensory organs and their role in correct and incorrect knowledge, states that the soul is not a sense organ nor an internal organ. |-style="text-align: center;" | width=80px | 2 | width=80px | 72 | width= 450px style="text-align: left;" | presents its theory of soul (self, atman), that the essence of a person and source of judgments is the soul, states its "judgment is non-eternal" theory, presents theory of [[Karma]] |-style="text-align: center;" | rowspan=2 style="background: #ffdd66;" | 4 | width=80px | 1 | width=80px | 68 | width= 450px style="text-align: left;" | Presents its theory of defects, then its theory that "everything has cause, and consequences", and its "some things are eternal, some non-eternal" theory. Defines and describes Fruits, Pain, Release. |-style="text-align: center;" | width=80px | 2 | width=80px | 50 | width= 450px style="text-align: left;" | Presents correct knowledge is necessary and sufficient to destroy defects. Both whole and part must be known. Establishes external world exists, and phenomenon are as real as objects. Refutes the "everything is false" theory. Presents ways to produce and maintain correct knowledge, Need to seek and converse with those with knowledge. |-style="text-align: center;" | rowspan=2 style="background: #ffdd66;" | 5 | width=80px | 1 | width=80px | 43 | width= 450px style="text-align: left;" | 24 futile rejoinders, how to avoid errors and present relevant rejoinders |-style="text-align: center;" | width=80px | 2 | width=80px | 24 | width= 450px style="text-align: left;" | 22 ways of losing an argument |} ==Content== [[File:Ancient Nyayasutras first ten sutras in Sanskrit.jpg|thumb|The first ten sutras of the text in [[Sanskrit]]|upright=1.3]] The first sutra 1.1.1 of the text asserts its scope and the following sixteen categories of knowledge as a means to gain competence in any field of interest: {{Quote| Perfection is attained by the correct knowledge about true nature of sixteen categories: means of right knowledge ([[pramāṇa]]); object of right knowledge (''prameya''); doubt (''samsaya''); purpose (''prayojana''); familiar instance (''dṛṣṭānta''); established tenet (''siddhānta''); members of an inference (''avayava''); reasoning (''tarka''); ascertainment or results (''nirṇaya''); discussion (''vāda''); sophistic disputations (''jalpa''); cavil (''vitaṇḍa''); fallacies (''hetvābhāsa''); quibbles ([[fraud|chala]]); futile rejoinders (''jāti''); and methods of losing an argument (''nigrahasthāna''). |Nyayasutra|1.1.1SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n27/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, page 1Nandalal Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}}, page 1}} These sixteen categories cover many sections of the text. The verse 1.1.2 of the ''Nyāya Sūtra'' declares the text's goal is to study and describe the attainment of liberation of soul from wrong knowledge, faults and sorrow, through the application of above sixteen categories of perfecting knowledge.Chattopadhyaya, D. (1986). ''Indian Philosophy: A popular Introduction'', New Delhi: People's Publishing House, {{ISBN|81-7007-023-6}}, p.163SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n25/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, page 2 ===Means of attaining valid knowledge=== The Nyaya-sutras assert the premise that "all knowledge is not intrinsically valid", that "most knowledge is not valid unless proven" and "truth exists whether we human beings know it or not".Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 134-138 However, states Fowler, the text accepts the foundation that "some knowledge is self evident" and axiomatic in every field of knowledge, which can neither be proven nor needs proof, such as "I am conscious", "I think" and "soul exists".S Dasgupta (1996), ''Yoga Philosophy: In Relation to Other Systems of Indian Thought'', Motilal Banarsidass, {{ISBN|978-8120809093}}, pages 142–148 Furthermore, the text presents its thesis that knowledge is not self-revealing, one must make effort to gain knowledge and this is a systematic process that empowers one to learn correct knowledge, and abandon incorrect knowledge.Stephen Phillips (2014), Epistemology in Classical India: The Knowledge Sources of the Nyaya School, Routledge, {{ISBN|978-1138008816}}, Chapter 1 The [[Nyāya]] sutras asserts and then discusses four reliable means of obtaining knowledge (''[[Pramana|pramāṇa]]''), viz., Perception, Inference, Comparison and Reliable Testimony.John A. Grimes, A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English, State University of New York Press, {{ISBN|978-0791430675}}, page 238 ====Pratyaksha: Perception==== The Nyayasutras assert that perception is the primary proper means of gaining true knowledge. All other epistemic methods are directly or indirectly based on perception, according to the text, and anything that is claimed to be "true knowledge" must be confirmed or confirmable by perception. This it terms as the doctrine of convergence, and this doctrine includes direct or implied perception. Gautama defines perception as the knowledge that arises by the contact of one or more senses with an object or phenomenon.Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 223–224 Gautama dedicates many sutras to discuss both the object and subject in the process of perception, and when senses may be unreliable. Erratic eyesight or other senses (''Avyabhicara'') can be a source of doubt or false knowledge, as can prejudgmental or prejudicial state of mind, states the Nyayasutras. The text asserts ''Pratyaksa'' leads to ''Laukika'' or ordinary knowledge, where the five senses directly and clearly apprehend a reality, and this is true definite knowledge according to the text. It defines indefinite knowledge as one where there is doubt, and the text gives an example of seeing a distant stationary object in the evening and wondering whether it is a post or a man standing in the distance. In some of these cases, states Nyayasutras, correct knowledge is formulated by the principle of cumulative evidence. ''Manas'' (mind) is considered an internal sense, in the text, and it can either lead to correct or incorrect knowledge depending on how it includes, excludes or integrates information. These ideas are compiled, in later chapters of the text, into its treatise on ''Aprama'' (Theory on Errors). ====Anumana: Inference==== {{Quote box |width=25em | bgcolor=#FFE0BB |align=right |salign = right |quote= Inference is knowledge which is preceded by perception, and is of three kinds: a priori, a posteriori and commonly seen. |source =— ''Nyayasutras'' 1.1.5SC Vidyabhushan and NL Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}}, page 4}} The epistemic rationale for inference as a reliable source of knowledge, and Nyaya's theory has been a major contribution to the diverse schools of Indian Darshanaparampara, and other schools looked up to Nyaya scholars for insights on correct knowledge and incorrect knowledge through inference. The sections in Nyayasutras on inference blossomed into a treatise on [[syllogism]] over time. Nyayasutras defines inference as the knowledge that follows or derives from other knowledge. It always follows perception, states the text, and is a universal relation or essential principle. One form of inference is a ''Purvavat'', or as Fowler translates, "from cause to effect or a priori". Thus, if a path or road is wet or river is swollen, states the text, then "it has rained" is a valid knowledge. The sutras assert that the "universal relationship" between the two is necessary for correct, reliable knowledge, that is "if in all cases of A, B is true, then one may correctly infer B whenever A is perceived". Further, there is a causal relation between the two, whether one knows or not of that cause, but inferred knowledge does not require one to know the cause for it to be valid knowledge, states Nyayasutra.SC Vidyabhushan and NL Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}}, pages 55–70 The text states one must not confuse coexistence as a universal relation, and that while deduction and induction both are useful and valid means for gaining true knowledge, it lists rules when this method can lead to false knowledge.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Indian Darshanaparampara, Sussex Academic Press, {{ISBN|978-1898723943}}, pages 142–144 ====Upamana: Comparison and analogy==== The word ''upamana'', states Fowler, is a compound of ''upa'' (similarity) and ''mana'' (knowledge).Jeaneane Fowler (2002), ''Perspectives of Reality: An Introduction to the Philosophy of Hinduism'', Sussex Academic Press, {{ISBN|978-1898723943}}, pages 144–145 It is a means of gaining knowledge based on "similarity, comparison, analogy", and considered reliable in Nyaya and many schools of Indian Darshanaparampara (but not in Vaisheshika and Charvaka, or Buddhism).John A. Grimes (2006), ''A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English'', State University of New York Press, {{ISBN|978-0791430675}}, page 238Wilhelm Halbfass (1985), India and the Comparative Method, Philosophy East and West, Vol. 35, No. 1, pages 3–15;
For history see: VS Sowani and VV Sowani (1920), Annals of the Bhandarkar Oriental Research Institute, Vol. 1, No. 2, pages 87–98 The Nyayasutras define ''upamana'' as the knowledge of a thing based on "its likeness to another thing which is familiar".SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n27/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, pages 3–4 It differs from ''Anumana'' (inference) in lacking a direct or immediate causal relation. It differs from ''Pratyaksha'' (perception), states the text, in using a linguistic referent and the foundation of pre-existing knowledge within the individual and what he learnt from his teachers, friends, family and past knowledge inherited from the wise, through a process of social cooperation.Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 222–227, 406–408 The ''Upamana'' method is secondary, it relies on perception, combined with linguistic referent and context. Comparison is not isolated ''pramana'' means, and sometimes works together with the ''Anumana'' and ''Sabda'' epistemic methods.SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n59/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, pages 35–43 Comparison is, in Nyayasutras, the process of permeating or infusing hypothesis, examples and tests, thus leading to objectivity and correct knowledge about something new and what one already presumes to know.Stephen Phillips (2014), ''Epistemology in Classical India: The Knowledge Sources of the Nyaya School'', Routledge, {{ISBN|978-1138008816}}, Chapter 5S Dasgupta (2004), ''A History of Indian Philosophy'', Volume 1, Motilal Banarsidass, {{ISBN|978-8120804128}}, pages 354–360 ====Shabda: Testimony and reliable sources==== ''Śabda'' ({{Langx|sa|शब्द}}, Word), in ''Nyayasutras'', means relying on word, testimony of a reliable source.SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n29/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, pages 4–5 *Eliott Deutsche (2000), in Philosophy of Religion : Indian Philosophy Vol 4 (Editor: Roy Perrett), Routledge, {{ISBN|978-0815336112}}, pages 245–248; *John A. Grimes (2006), A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English, State University of New York Press, {{ISBN|978-0791430675}}, page 238 ''Sabda-pramana'' has been an accepted and reliable method to knowledge by all orthodox schools of Hinduism including [[Nyaya]], asserting that a human being needs to know numerous facts, and with the limited time and energy available, he can learn only a fraction of those facts and truths directly.M. Hiriyanna (2000), The Essentials of Indian Philosophy, Motilal Banarsidass, {{ISBN|978-8120813304}}, page 43Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, pages 145–146 He must rely on others, his parents, family, friends, teachers, ancestors and kindred members of society to rapidly acquire and share knowledge and thereby enrich each other's lives. This means of gaining correct knowledge is either spoken or written, but it is through ''Sabda'' (words). In addition to words, state the Nyayasutras, ''Shabda'' as a means of true knowledge depends on an agreed convention on what words mean, the structure of sentences, establishing context and their import. The source must be reliable and comprehensible, and the receiver of knowledge must be able to understand the knowledge therefrom.JL Shaw (2000), Conditions for Understanding the Meaning of a Sentence: The Nyāya and the Advaita Vedānta, Journal of Indian Philosophy, Volume 28, Issue 3, pages 273–293 The reliability of the source is important, and legitimate knowledge can only come from the ''Sabda'' of reliable sources. The schools of Indian Darshanaparampara have debated if, how and when reliability of source can be objectively established. Gautama, in the Nyayasutras, offers a description for a reliable source.SC Vidyabhushana (1913, Translator), [https://archive.org/stream/TheNyayaSutrasOfGotama/Vidyabhusana_Nyaya-Sutras_1913#page/n29/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, pages 4–5, 37–39, 59–61 Some schools, such as [[Charvaka]], state that this is never possible, and therefore ''Sabda'' in the [[Vedas]] or anyone else, can never be a proper ''pramana''. Other schools debate means to establish reliability.P. Billimoria (1988), Śabdapramāṇa: Word and Knowledge, Studies of Classical India Volume 10, Springer, {{ISBN|978-94-010-7810-8}}, pages 1–30 ===Theory of proper argument=== The text, in sutras 1.1.32 and 1.1.39, presents its theory of proper arguments, stating that a proper argument must include five components:Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, page 224SC Vidyabhushan and NL Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}}, pages 13–16 # ''pratijna'' – the proposition or hypothesis (that which needs to be proved or decided) # ''hetu'' – the reason (can be positive or negative) # ''udaharana'' – the general rule (that which is independently confirmed or confirmable) # ''upanaya'' – the application of the rule (validity test, or example to the instance) # ''nigamana'' – the conclusion (the hypothesis is either true or false or in doubt) The text defines and aphoristically discusses each of these. An example of a proper argument is: Julian Baggini (2018), How the World Thinks #There is a fire on the hill #Because there is smoke on the hill #Whenever there is smoke, there is a fire #The hill is smoky #Therefore, there is a fire on the hill ===Theory of doubt as incomplete knowledge=== The Nyayasutras define and discuss ''Samsaya'' ({{Langx|sa|संशय|links=no}}, doubt) in sutras 1.1.23, 2.1.1 to 2.1.7, 3.2.1, 4.2.4 among others.SC Vidyabhushan and NL Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}}, pages 10, 29–32, 105, 158 This discussion is similar to those found in other schools of Hindu philosophy, expands on the theory of doubt presented by Kanada in the [[Vaisheshika]] school, but disagrees with the [[Charvaka]] school's theory of doubt and consequent "there is no empirical knowledge ever".Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 170–172 The theory of doubt, according to the Nyayasutras, starts with the premise that doubt is part of the human learning process and occurs when conflicting possibilities exist with regard to a cognized object. Doubt is neither error nor absence of knowledge, but a form of uncertainty and human struggle with probability when it faces incomplete or inconsistent information. It is a knowledge that is possibly partially valid and partially invalid, but doubt is a form of knowledge that has positive value. Doubt is an invitation to "proceed to further investigation", asserts the text. All four means of knowledge discovery (perception, inference, comparison and testimony) may be useful in this investigation, but doubt is both a psychological state and a means to knowledge, not in itself a valid knowledge, according to the sutras.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 132-134JN Mohanty (1970), Nyāya Theory of Doubt, Phenomenology and Ontology, Volume 37, {{ISBN|978-9401032544}}, pages 198–219 ===Hetvabhasa, theory of errors=== The Nyayasutra defines error as knowledge, an opinion or a conclusion about something that is different from what it really is. Gautama states in the text that the error is always in the process of cognition itself, or the "subjective self", and not in the object. It is the duty of the knowledge-seeker to "test the validity of his knowledge", both in assumptions or through practice (experience), but neither the object of knowledge nor the knowledge itself is responsible for errors; only the knowledge-seeker and his process of cognition is.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 139-140S Rao (1998), Perceptual Error: The Indian Theories, University of Hawaii Press, {{ISBN|978-0824819583}}, pages 59–72 The Nyaya theory shares ideas on the theory of errors with [[Advaita Vedanta]], [[Buddhism]] and [[Mimamsa]] schools of Indian philosophies, states Rao, and these schools likely influenced each other.S Rao (1998), Perceptual Error: The Indian Theories, University of Hawaii Press, {{ISBN|978-0824819583}}, pages 22–23, 21–44 The text identifies and cautions against five kinds of fallacious reasoning (''hetvabhasa'') in sutra 1.2.4, discussing each in the sutras that follow, stating that these lead to false knowledge, in contrast to proper reasoning (''hetu''), which leads to true knowledge. The five fallacies or errors, according to Nyayasutras, are to be avoided, in addition to watching for debating tricks (''chala'') used by those whose aim is not true knowledge.Roy Perrett (2001), Indian Philosophy: Logic and philosophy of language, Routledge, {{ISBN|978-0815336105}}, page xiv The five forms of bogus reasoning identified by the text, states Ganeri, are:J Ganeri (2003), Philosophy in Classical India: An Introduction and Analysis, Routledge, {{ISBN|978-0415240352}}, pages 33–40K Ramasubramanian (2011), The Concept of Hetvābhāsa in Nyāya-śāstra, in ''Proof, Computation and Agency'', Volume 352, Springer Netherlands, {{ISBN|978-9400700796}}, pages 355–371 # the wandering or erratic (Nyayasutra 1.2.5)SC Vidyabhushan and NL Sinha (1990), The Nyâya Sûtras of Gotama, Motilal Banarsidass, {{ISBN|978-8120807488}}, pages 21–23 # the contradictory (Nyayasutra 1.2.6) # the unproven (Nyayasutra 1.2.8) # the counterbalanced (Nyayasutra 1.2.7) # the untimely (overgeneralization across time, or sublated, Nyayasutra 1.2.9)Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 198–199 ===Theory of causality=== The Nyayasutras dedicate many sections on causality and causal relations (''Karana'', {{Langx|sa|कारण|links=no}}), particularly Book 4.Bimal Krishna Matilal (1975), Causality in the Nyāya-Vaiśeṣika School, Philosophy East and West, Vol. 25, No. 1, pages 42–44S Dasgupta (2004), A History of Indian Philosophy, Volume 1, Motilal Banarsidass, {{ISBN|978-8120804128}}, pages 319–326 Causes, in Nyaya view states Fowler, are "antecedents of their effects invariably and unconditionally".Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, pages 150–152 A specific effect is produced by a specific cause (plurality in causes is accepted). A specific cause produces a specific effect and no other (plurality in effect, or contradictory effect is not accepted). There cannot be reciprocity to a cause; either we misunderstand the cause or misapprehend the effect. The text rejects remote or supernatural causes, and rejects that qualities are causes. Causes are immediately antecedent, causes exist before an effect in time, and to know something is to understand the effect and the specific cause(s).Bimal Krishna Matilal (1975), Causality in the Nyāya-Vaiśeṣika School, Philosophy East and West, Vol. 25, No. 1, pages 41–48 The text identifies three types of causes – inherent or [[Four causes|material cause]] (''Samavayi-karana''), non-inherent cause (''Asamavayi-karana''), and [[efficient cause]] (''Nimitta-karana'').John C. Plott et al. (2000), Global History of Philosophy: The Patristic-Sutra period, Volume 3, Motilal Banarsidass, {{ISBN|978-8120805507}}, pages 66–67 These, it states, arise from ''Dravya'' (substance), ''[[Guṇa|Guna]]'' (quality) and ''Karma'' (action).JL Shaw (2002), Causality: Sāmkhya, Bauddha and Nyāya, Journal of Indian Philosophy, Vol. 30, Issue 3, pages 213–270 ===Theory of negatives=== The text seeds the theory of negative entities, where both being and non-being, presence and absence of something is considered correct and useful knowledge.KK Chakrabarti (1978), The Nyaya-Vaisesika theory of negative entities, Journal of Indian Philosophy, Vol. 6, No. 2, pages 129–144 Absence of a book on a table or absence of particular color in a painting has a place in its epistemic process, in addition to positively verifiable characteristics of the table or a painting. ===God in Nyayasutras=== Early [[Nyaya]] school scholars considered the hypothesis of [[Ishvara]] as a creator God with the power to grant blessings, boons and fruits.John Clayton (2010), Religions, Reasons and Gods: Essays in Cross-cultural Philosophy of Religion, Cambridge University Press, {{ISBN|978-0521126274}}, page 150G Oberhammer (1965), Zum problem des Gottesbeweises in der Indischen Philosophie, Numen, 12: 1–34 In Nyayasutra's Book 4, Chapter 1 examines what causes production and destruction of entities (life, matter) in the universe. It considers many hypotheses, including ''Ishvara''. Verses 19–21 postulate that Ishvara exists and is the cause, states a consequence of the postulate, then presents contrary evidence, and from contradiction concludes that the postulate must be invalid. {{Quote| सिद्धान्तसूत्र : '''ईश्वरः''' कारणम्, पुरुषकर्माफल्यदर्शनात् पूर्वपक्षसूत्र : न, पुरुषकर्माभावे फ्लानिष्पत्तेः सिद्धान्तसूत्र : तत्कारितत्वादहेतुः Proposition sutra: '''Ishvara''' is the cause, since we see sometimes human action lacks fruits (results). Prima facie objection sutra: This is not so since, as a matter of fact, no fruit is accomplished without human action. Conclusion sutra: Not so, since it is influenced by him. |Nyaya Sutra|4.1.19 – 4.1.21Original Sanskrit: [https://archive.org/details/Anandashram_Samskrita_Granthavali_Anandashram_Sanskrit_Series Nyayasutra] Anand Ashram Sanskrit Granthvali, pages 290–292; [http://www.sanskritworld.in/public/mpdf/downloadpdf.php?filename=book_50f6f8075590b.txt Alternate Archive] {{webarchive|url=https://web.archive.org/web/20161107181842/http://www.sanskritworld.in/public/mpdf/downloadpdf.php?filename=book_50f6f8075590b.txt |date=7 November 2016 }}
English translation: Francis X. Clooney (2010), Hindu God, Christian God: How Reason Helps Break Down the Boundaries, Oxford University Press, {{ISBN|978-0199738724}}, page 37}} Other scholars of Nyaya school reconsidered this question and offered arguments for what is God ([[Ishvara]]) and various arguments to prove the existence of ''Ishvara''.Francis X. Clooney (2010), Hindu God, Christian God: How Reason Helps Break Down the Boundaries, Oxford University Press, {{ISBN|978-0199738724}}, pages 18–19, 35–39 The 5th century CE Nyaya school scholar Prastapada, for example, revisited the premise of God. He was followed by [[Udayana]], who in his text ''[[Nyayakusumanjali]]'', interpreted "it" in verse 4.1.21 of Nyaya Sutra above, as "human action" and "him" as "Ishvara", then he developed counter arguments to prove the existence of Ishvara, a reasoning that fueled the debate and disagreements on God in Neo-Nyaya and other Hindu traditions of 2nd millennium CE.Sharma, C. (1997). ''A Critical Survey of Indian Philosophy'', Delhi: Motilal Banarsidass, {{ISBN|81-208-0365-5}}, pp. 209–10VR Rao (1987), Selected Doctrines from Indian Philosophy, {{ISBN|81-70990009}}, pages 11–12 ===Soul, self exists, inner freedom=== {{Quote box |width=28em | bgcolor=#FFE0BB |align=right |salign = right |quote= The Soul is the perceiver of all that brings pain and pleasure, the experiencer of all pains and pleasures, the knower of all pains, pleasures and their causes, the ground of consciousness, knowledge and cognitions. The Soul (self) can be known. |source =— ''Nyayasutras'', interpreted by Jeaneane Fowler, Perspectives of Reality: An Introduction to the Philosophy of HinduismJeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 147, with 148–150}} A large part of the third book of the Nyayasutras is dedicated to the premise and the nature of a Self (soul, [[Ātman (Hinduism)|atman]]) and its relation to knowledge, liberation from sorrow and inner freedom (moksha).Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 31–37, 95–96, 228–233 ===Philosophy: a form of Yoga=== The sutras 4.2.42 to 4.2.48 of Nyayasutras, states Stephen Phillips, state that "philosophy is a form of [[yoga]]".Stephen Phillips (2009), Yoga, Karma, and Rebirth: A Brief History and Philosophy, Columbia University Press, {{ISBN|978-0231144841}}, page 281 footnote 40 The text recommends [[Dhyana in Hinduism|yogic meditation]] in quiet places such as a forest, cave or sandy beach in sutra 4.2.42, that the knowledge seeker should purify one's soul by [[Yamas]], [[Niyama]]s and spiritualism of yoga in sutra 4.2.46. Meditation is a treasured and recommended practice in the text, and extensively discussed by Nyaya scholars that followed Aksyapada Gautama.Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, {{ISBN|978-1898723943}}, page 157 Vatsyayana wrote in his commentary on Nyayasutras, for example, that meditation is that which enables the mind to contact one's soul, which is accompanied by a conscious eagerness to get at the truth, and such meditation is an essential practice to gain true knowledge. The Nyayasutras state that one must study the means of correct knowledge and hold discussions with the learned, sincere and unenvious fellow seekers of knowledge state sutras 4.2.47 and 4.2.48. One must, translates Phillips, take into account "consideration of personal character as well as the nature of beliefs held by the opponent", in deciding the nature of one's discussions, according to Nyayasutras.Stephen Phillips (2009), Yoga, Karma, and Rebirth: A Brief History and Philosophy, Columbia University Press, {{ISBN|978-0231144841}}, pages 65–66 In some cases, asserts the text, it is better to avoid arguing with hostile opponents and use methods of knowledge like "a fence is used to safeguard the growth of seeds".SC Vidyabhushana (1913, Translator), [https://archive.org/stream/NyayaSutra/nyaya_sutras_of_gautama#page/n161/mode/2up The Nyâya Sutras], The Sacred Book of the Hindus, Volume VIII, Bhuvaneshvar Asrama Press, pages 137–139Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, page 237 ==Commentaries== The earliest surviving complete [[bhasya]] (review and commentary) on Nyaya Sutras is by Vatsyayana. This commentary itself inspired many secondary and tertiary ''bhasya''. Vatsyayana's commentary has been variously dated to be from the 5th century CE, or much earlier around 2nd century BCE.KK Chakrabarti (1999), Classical Indian Philosophy of Mind: The Nyaya Dualist Tradition, SUNY Press, {{ISBN|978-0791441718}}, pages 14–15 Another often studied surviving commentary on the text is credited to Vacaspati Mishra from about 9th century CE. {{Quote box |width=28em | bgcolor=#FFE0BB |align=right |salign = right |quote= Liberation is impossible without knowledge of the real nature of the world. To achieve liberation and to know the soul, one must take shelter of [[yoga]] practices, because without this knowledge, knowledge of Reality is not obtained. |source =— Akṣapada Gautama in ''Nyayasutra''}} Other historical Indian commentaries and works inspired by Nyayasutras and which have survived into the modern era, include ''Nyaya-varttika'' by 6th-century Uddyotakara, ''Nyaya-bhasyatika'' by 6th-century Bhavivikta, another ''Nyaya-bhasyatika'' by 7th-century Aviddhakarna, ''Nyaya-bhusana'' by 9th-century Bhasarvajana, ''Nyaya-manjari'' by 9th-century [[Kashmir]] scholar Jayanta Bhatta, ''Nyaya-prakirnaka'' by 10th-century [[Vijayanagara Empire|Karnata]] scholar Trilocana, and ''Nyaya-kandali'' by 10th-century [[Bengal]] scholar Sridhara.Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, {{ISBN|978-8120803091}}, pages 8–10 Numerous other commentaries are referenced in other Indian historical texts, but these manuscripts are either lost or yet to be found. Starting around 11th- to 12th century CE, Udayana wrote a primary work, that built upon and expanded the theories on reason found in Nyayasutras. Udayana's work created the foundation for Navya-Nyaya (new Nyaya) school. The Hindu scholar Gangesa of 13th- or 14th-century, integrated the Gautama's Nyayasutras and Udayana's Navya-Nyaya work, to create the influential ''[[Tattvacintāmaṇi]]'' text considered a masterpiece by scholars.Stephen Phillips (1992), Review: Gadadhara's Theory of Objectivity, Philosophy East and West, Volume 42, Issue 4, page 669 ==Influence== ===On Hinduism's soul, Buddhism's no-soul debate=== The Nyaya-sutras have been one of the foundations for the historic debate between Hinduism's premise that [[Purusha|purusa]] (spirit, ultimate reality) and atman (selfhood, soul) exists, and Buddhism's premise that there is voidness and anatta (no-soul).P Bilimoria and JN Mohanty (2003), Relativism, Suffering and Beyond, Oxford University Press, {{ISBN|978-0195662078}}, pages i–ix with Introduction and Chapter 3J Ganeri (2012), The Self: Naturalism, Consciousness, and the First-Person Stance, Oxford University Press, {{ISBN|978-0199652365}}, pages 162–169Ganganatha Jha (1999 Reprint), Nyaya-Sutras of Gautama, Vol 1, Motilal Banarsidass, {{ISBN|978-8120812642}}, pages 198–199 In Nyaya-sutra, the Buddhist premises and arguments to refute those premise are found in many chapters,{{refn|group=note|Nyayasutras' 3.2.10–17 present its argument against Buddhist "momentariness of everything", while sutras 4.1.37–40 challenge the "voidness of everything" premise of Buddhism, sutras 4.2.6–4.2.11 question its "whole is not separate from parts" premise, and sutras 4.2.26–37 present its refutation of Buddhism's "denial of objects and observed reality" premises.}} such as sutras of chapters 3.2, 4.1 and 4.2. The text has been influential in this debate, with the 2nd-century Buddhist scholar [[Nagarjuna]] states that the Nyaya school and Buddhism differ on their conception of Self (Atman) and their views on the [[Vedas]], and the sutra 4.2.25 of Nyayasutra is addressed against the Madhyamika system of Buddhism.{{refn|group=note|Like other schools of Hinduism, the Nyaya school holds the premise, "Soul exists, and Soul (or self, Atman) is a self evident truth". Buddhism, in contrast, holds the premise, "Atman does not exist, and An-atman (or ''Anatta'', non-self)[https://www.britannica.com/topic/anatta Anatta], Encyclopædia Britannica (2013), Quote: "Anatta in Buddhism, the doctrine that there is in humans no permanent, underlying soul. The concept of anatta, or anatman, is a departure from the Hindu belief in atman ("the self")." is self evident".John C. Plott et al (2000), Global History of Philosophy: The Axial Age, Volume 1, Motilal Banarsidass, {{ISBN|978-8120801585}}, page 63, Quote: "The Buddhist schools reject any Ātman concept. As we have already observed, this is the basic and ineradicable distinction between Hinduism and Buddhism". Buddhists do not believe that at the core of all human beings and living creatures, there is any "eternal, essential and absolute something called a soul, self or atman".'''[a]''' KN Jayatilleke (2010), Early Buddhist Theory of Knowledge, {{ISBN|978-8120806191}}, pages 246–249, from note 385 onwards;
'''[b]''' Steven Collins (1994), Religion and Practical Reason (Editors: Frank Reynolds, David Tracy), State Univ of New York Press, {{ISBN|978-0791422175}}, page 64; "Central to Buddhist soteriology is the doctrine of not-self (Pali: anattā, Sanskrit: anātman, the opposed doctrine of ātman is central to Brahmanical thought). Put very briefly, this is the [Buddhist] doctrine that human beings have no soul, no self, no unchanging essence.";
'''[c]''' Edward Roer (Translator), {{Google books|3uwDAAAAMAAJ|Shankara's Introduction|page=2}} to ''Brihad Aranyaka Upanishad'', pages 2–4;
'''[d]''' Katie Javanaud (2013), Is The Buddhist 'No-Self' Doctrine Compatible With Pursuing Nirvana?, Philosophy Now}} Nagarjuna's ''Madhyamika-karika'' targets Nyaya-sutra, among other Hindu texts, for his critique and to establish his doctrine of [[Anatta|no self]] and [[Shunya|voidness]]. In this text, and Vigrahavya-vartani, he presents his proof of voidness by challenging the ''Pramanas'' at the foundation of Nyaya-sutras.John Kelley (1997), in Bhartrhari: Philosopher and Grammarian (Editors: Saroja Bhate, [[Johannes Bronkhorst]]), Motilal Banarsidass, {{ISBN|978-8120811980}}, pages 179–188P Bilimoria and JN Mohanty (2003), Relativism, Suffering and Beyond, Oxford University Press, {{ISBN|978-0195662078}}, Chapters 3 and 20 In his work ''Pramana-vihetana'', Nagarjuna, takes up each of the sixteen categories of knowledge in Gautama's Nyaya-sutras at the foundation of Nyaya's discussion of "soul exists and the nature of soul in liberation process", and critiques them using the argument that these categories are relational and therefore unreal. The Nagarjuna's texts, along with Gautama's Nyaya-sutras states Sanjit Sadhukhan, influenced Vatsyayana's work who called Nagarjuna's doctrine of voidness as flawed, and presented his arguments refuting Nagarjuna's theory on "objects of knowledge are unreal, like a dream or a form of jugglery and a mirage", but by first presenting his demonstration that the theory of reason and knowledge in the Nyaya-sutras are valid.Sanjit Sadhukhan (1990), The conflict between the Buddhist and the Naiyayika Philosophers, Journal: Bulletin of Tibetology, Vol. BT1990, Issues 1–3, pages 39–54David Burton (1999)< Emptiness Appraised: A Critical Study of Nagarjuna's Philosophy, Routledge, {{ISBN|978-0700710669}}, pages 1-5, 127-138, 151-153, 160-166, 181-195 The [[Buddhism|Buddhist]] thesis that all things are negative in nature (inasmuch as a thing's nature is constituted by its differences from others), or the Hindu thesis counter-arguing the Buddhist thesis, have been accepted, is still unclear because nothingness cannot be proved and existence of soul has been claimed solely on the basis of personal feeling and experience.{{Citation needed|date=January 2016}} ===On Vedanta traditions=== The Nyayasutras were influential to the Vedanta schools of Hindu philosophy, and provided the epistemological foundations.CR Prasad (2002), Advaita Epistemology and Metaphysics, Routledge, {{ISBN|978-0700716043}}, pages 101–110, 129–136BNK Sharma (2008), A History of the Dvaita School of Vedānta and Its Literature, Motilal Banarsidass, {{ISBN|978-8120815759}}, pages 306–311 The terms ''Nyaya'' and ''Mimamsa'' were synonymous, states Hajime Nakamura, in the earliest Dharmasutras of 1st millennium BCE.Hajime Nakamura (1989), A History of Early Vedānta Philosophy, Volume 2, {{ISBN|978-8120806511}}, pages 313–321 Over time, Nyaya, Mimamsa and Vedanta became three distinct and related schools. ==Translations== * Nandalal Sinha, Mahamahopadhyaya Satisa Chandra Vidyabhusana, ''The Nyaya Sutras of Gotama'', The sacred books of the Hindus, 1930; Motilal Banarsidass, 1990 reprint, {{ISBN|978-81-208-0748-8}}; Munshiram Manoharlal reprint, 2003, {{ISBN|978-81-215-1096-7}}. *Ganganatha Jha, ''Nyaya- Sutras of Gautama'' (4 vols.), Motilal Banarsidass, 1999 reprint, {{ISBN|978-81-208-1264-2}}. ==See also== *[[Debates in ancient India]] *[[Nyaya]] ==Notes== {{reflist|group=note}} ==References== {{Reflist|30em}} ==Further reading== * J Ganeri (2001), Indian Logic: A Reader, Routledge, {{ISBN|978-0700713066}} * Sue Hamilton, ''Indian Philosophy: A Very Short Introduction'' (Oxford University Press, 2001) {{ISBN|0-19-285374-0}} * [[B.K. Matilal]], ''Epistemology, Logic, and Grammar in Indian Philosophical Analysis'' (Oxford University Press, 2005) {{ISBN|0-19-566658-5}} * J.N. Mohanty, ''Classical Indian Philosophy'' (Rowman & Littlefield, 2000) {{ISBN|0-8476-8933-6}} ==External links== *[https://archive.org/stream/NyayaSutra/nyaya_sutras_of_gautama#page/n1/mode/2up The Nyâya Sutras of Gotama], SC Vidyabhushana (1913), English translation *[https://gretil.sub.uni-goettingen.de/gretil/1_sanskr/6_sastra/3_phil/nyaya/gaunys_u.htm Gautama's Nyayasutra without any commentary], GRETIL version of Sanskrit text, University of Goettingen, Germany *[http://sarit.indology.info/nyayamanjari.xml?view=page Nyāyasūtra: Devanagari], A SARIT Initiative, German Research Foundation *[http://gretil.sub.uni-goettingen.de/gretil/1_sanskr/6_sastra/3_phil/nyaya/nystik_u.htm Gautama's Nyayasutra with Vacaspatimisra's commentary ''Nyayavarttikatatparyatika''], GRETIL version of Sanskrit text, University of Goettingen, Germany *[http://gretil.sub.uni-goettingen.de/gretil/1_sanskr/6_sastra/3_phil/nyaya/nysvbh1u.htm Gautama: Nyayasutra with Vatsyayana's commentary ''Nyayabhasya''], GRETIL version of Sanskrit text, University of Goettingen, Germany {{Hindudharma}} {{Indian Philosophy}} {{DEFAULTSORT:Nyaya Sutras}} [[Category:Epistemology literature]] [[Category:History of logic]] [[Category:Logic literature]] [[Category:Metaphysics literature]] [[Category:Nyaya]] [[Category:Sutras (Hinduism)]] [[Category:Indian philosophy books]]