The Info List - Nyaya

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NYāYA ( Sanskrit : न्याय, ny-āyá), literally means "rules", "method" or "judgment". It is also the name of one of the six orthodox (astika ) schools of Hinduism . This school's most significant contributions to Indian philosophy was systematic development of the theory of logic , methodology, and its treatises on epistemology.

Nyaya school's epistemology accepts four out of six Pramanas as reliable means of gaining knowledge – Pratyakṣa (perception), Anumāṇa (inference), Upamāṇa (comparison and analogy) and Śabda (word, testimony of past or present reliable experts). In its metaphysics , Nyaya school is closer to Vaisheshika school of Hinduism than others. It holds that human suffering results from mistakes/defects produced by activity under wrong knowledge (notions and ignorance). Moksha (liberation), it states, is gained through right knowledge. This premise led Nyaya to concern itself with epistemology, that is the reliable means to gain correct knowledge and to remove wrong notions. False knowledge is not merely ignorance to Naiyyayikas, it includes delusion. Correct knowledge is discovering and overcoming one's delusions, and understanding true nature of soul, self and reality.

Naiyyayika scholars approached philosophy as a form of direct realism , stating that anything that really exists is in principle humanly knowable. To them, correct knowledge and understanding is different than simple, reflexive cognition; it requires Anuvyavasaya (अनुव्यवसाय, cross-examination of cognition, reflective cognition of what one thinks one knows). An influential collection of texts on logic and reason is the Nyayasutras , attributed to Aksapada Gautama , variously estimated to have been composed between 6th-century BCE and 2nd-century CE.

Nyaya school shares some of its methodology and human suffering foundations with Buddhism ; however, a key difference between the two is that Buddhism believes that there is neither a soul nor self; Nyaya school like other schools of Hinduism believes that there is a soul and self, with liberation (moksha) as a state of removal of ignorance, wrong knowledge, the gain of correct knowledge and unimpeded continuation of self.


* 1 Etymology * 2 Overview * 3 Sixteen Padārthas or Categories

* 4 Epistemology

* 4.1 Perception

* 4.1.1 Determinate and indeterminate perception

* 4.2 Inference

* 4.2.1 Theory of inference

* 4.3 Comparison, analogy * 4.4 Word, testimony * 4.5 Comparison with other schools of Hinduism

* 5 The Nyaya theory of causation * 6 Anyathakyativada of Nyaya

* 7 Nyaya on God and salvation

* 7.1 Arguments that God does not exist * 7.2 Arguments that God exists * 7.3 Liberation

* 8 Literature of Nyaya * 9 See also * 10 References * 11 Further reading * 12 External links


Nyaya (न्याय) is a Sanskrit word which means method, rule, specially a collection of general or universal rules. In some contexts, it means model, axiom, plan, legal proceeding, judicial sentence, or judgment. In the theory of logic, and Indian texts discussing it, the term also refers to an argument consisting of an enthymeme or sometimes for any syllogism . In philosophical context, Nyaya encompasses propriety, logic and method.

Nyaya is related to several other concepts and words used in Indian philosophies: Hetu-vidya (science of causes), Anviksiki (science of inquiry, systematic philosophy), Pramana-sastra (epistemology, science of correct knowledge), Tattva-sastra (science of categories), Tarka-vidya (science of reasoning, innovation, synthesis), Vadartha (science of discussion) and Phakkika-sastra (science of uncovering sophism, fraud, error, finding fakes). Some of these subsume or deploy the tools of Nyaya.


Nasadiya Sukta Then was not non-existent nor existent:

there was no realm of air, no sky beyond it. What covered in, and where? and what gave shelter? Was water there, unfathomed depth of water? (...) Who really knows? Who will here proclaim it? Whence was it produced? Whence is this creation? The gods came after this world's production, Who knows then whence it first came into being?" Rig Veda , Creation....10:129-1, 10:129-6

The historical development of Nyaya school is unclear, although Nasadiya hymns of Book 10 Chapter 129 of Rigveda recite its spiritual questions in logical propositions. In early centuries BCE, states Clooney , the early Nyaya scholars began compiling the science of rational, coherent inquiry and pursuit of knowledge. By 2nd century CE, Aksapada Gautama had composed Nyayasutras, a foundational text for Nyaya school, that primarily discusses logic, methodology and epistemology. The Nyaya scholars that followed refined it, expanded it, and applied it to spiritual questions. While the early Nyaya scholars published little to no analysis on whether supernatural power or God exists, they did apply their insights into reason and reliable means to knowledge to the questions of nature of existence, spirituality, happiness and moksha . Later Nyaya scholars, such as Udayana, examined various arguments on theism and attempted to prove existence of God. Other Nyaya scholars offered arguments to disprove the existence of God.

The most important contribution made by the Nyaya school to Hindu thought has been its treatises on epistemology and system of logic that, subsequently, has been adopted by the majority of the other Indian schools.


The Nyaya metaphysics recognizes sixteen padarthas or categories and includes all six (or seven) categories of the Vaisheshika in the second one of them, called prameya. These sixteen categories are pramāṇa (valid means of knowledge), prameya (objects of valid knowledge), saṁśaya (doubt), prayojana (aim), dṛṣṭānta (example), siddhānta (conclusion), avayava (members of syllogism), tarka (hypothetical reasoning), nirṇaya (settlement), vāda (discussion), jalpa (wrangling), vitaṇḍā (cavilling), hetvābhāsa (fallacy), chala (quibbling), jāti (sophisticated refutation) and nigrahasthāna (point of defeat).


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The Nyaya school considers perception, inference, comparison/analogy, and testimony from reliable sources as four means to correct knowledge, holding that perception is the ultimate source of such knowledge.

The Nyaya school of Hinduism developed and refined many treatises on epistemology that widely influenced other schools of Hinduism. Nyaya treated it as theory of knowledge, and its scholars developed it as Pramana -sastras. Pramana, a Sanskrit word, literally is "means of knowledge". It encompasses one or more reliable and valid means by which human beings gain accurate, true knowledge. The focus of Pramana is how correct knowledge can be acquired, how one knows, how one doesn't, and to what extent knowledge pertinent about someone or something can be acquired.

The Naiyayikas (the Nyaya scholars) accepted four valid means (pramaṇa) of obtaining valid knowledge (pramana) - perception (pratyakṣa), inference (anumāna), comparison (upamāna ) and word/testimony of reliable sources (śabda). The Nyaya scholars, along with those from other schools of Hinduism, also developed a theory of error, to methodically establish means to identify errors and the process by which errors are made in human pursuit of knowledge. These include Saṁśaya (समस्या, problems, inconsistencies, doubts) and Viparyaya (विपर्यय, contrariness, errors) which can be corrected or resolved by a systematic process of Tarka ( तर्क, reasoning, technique).


Pratyakṣa (perception) occupies the foremost position in the Nyaya epistemology. Perception can be of two types, laukika (ordinary) and alaukika (extraordinary). Ordinary perception is defined by Akṣapāda Gautama in his Nyaya Sutra (I,i.4) as a 'non-erroneous cognition which is produced by the intercourse of sense-organs with the objects'.

Indian texts identify four requirements for correct perception: Indriyarthasannikarsa (direct experience by one's sensory organ(s) with the object, whatever is being studied), Avyapadesya (non-verbal; correct perception is not through hearsay , according to ancient Indian scholars, where one's sensory organ relies on accepting or rejecting someone else's perception), Avyabhicara (does not wander; correct perception does not change, nor is it the result of deception because one's sensory organ or means of observation is drifting, defective, suspect) and Vyavasayatmaka (definite; correct perception excludes judgments of doubt, either because of one's failure to observe all the details, or because one is mixing inference with observation and observing what one wants to observe, or not observing what one does not want to observe).

Ordinary perception to Nyaya scholars was based on direct experience of reality by eyes, ears, nose, touch and taste. Extraordinary perception included yogaja or pratibha (intuition), samanyalaksanapratyaksa (a form of induction from perceived specifics to a universal), and jnanalaksanapratyaksa (a form of perception of prior processes and previous states of a 'topic of study' by observing its current state).

Determinate And Indeterminate Perception

The Naiyyayika maintains two modes or stages in perception. The first is called nirvikalpa (indeterminate), when one just perceives an object without being able to know its features, and the second savikalpa (determinate), when one is able to clearly know an object. All laukika and alaukika pratyakshas are savikalpa, but it is necessarily preceded by an earlier stage when it is indeterminate. Vātsāyana says that if an object is perceived with its name we have determinate perception but if it is perceived without a name, we have indeterminate perception. Jayanta Bhatta says that indeterminate perception apprehends substance, qualities and actions and universals as separate and indistinct something and also it does not have any association with name, while determinate perception aprrehends all these together with a name. There is yet another stage called Pratyabhijñā, when one is able to re-recognise something on the basis of memory.


Anumāna (inference) is one of the most important contributions of the Nyaya. It can be of two types: inference for oneself (Svarthanumana, where one does not need any formal procedure, and at the most the last three of their 5 steps), and inference for others (Parathanumana, which requires a systematic methodology of 5 steps). Inference can also be classified into 3 types: Purvavat (inferring an unperceived effect from a perceived cause), Sheshavat (inferring an unperceived cause from a perceived effect) and Samanyatodrishta (when inference is not based on causation but on uniformity of co-existence). A detailed analysis of error is also given, explaining when anumana could be false.

Theory Of Inference

The methodology of inference involves a combination of induction and deduction by moving from particular to particular via generality. It has five steps, as in the example shown:

* There is fire on the hill (called Pratijñā, required to be proved) * Because there is smoke there (called Hetu, reason) * Wherever there is smoke, there is fire, e.g. in a kitchen (called Udāhārana, example of vyāpti) * The hill has smoke that is pervaded by fire (called Upanaya, reaffirmation or application) * Therefore, there is fire on the hill (called Nigamana, conclusion)

In Nyāya terminology for this example, the hill would be called as paksha (minor term), the fire is called as sādhya (major term), the smoke is called as hetu, and the relationship between the smoke and the fire is called as vyapti (middle term). Hetu further has five characteristics: (1) It must be present in the Paksha, (2) It must be present in all positive instances, (3) It must be absent in all negative instances, (4) It must not incompatible with the minor term or Paksha and (5) All other contradictions by other means of knowledge should be absent. The fallacies in Anumana (hetvābhasa) may occur due to the following:

* Asiddha: It is the unproved hetu that results in this fallacy.

* Ashrayasiddha: If Paksha itself is unreal, then there cannot be locus of the hetu. e.g. The sky-lotus is fragrant, because it is a lotus like any other lotus. * Svarupasiddha: Hetu cannot exist in paksa at all. E.g. Sound is a quality, because it is visible. * Vyapyatvasiddha: Conditional hetu. `Wherever there is fire, there is smoke'. The presence of smoke is due to wet fuel.

* Savyabhichara: This is the fallacy of irregular hetu.

* Sadharana: The hetu is too wide. It is present in both sapaksa and vipaksa. `The hill has fire because it is knowable'. * Asadharana: The hetu is too narrow. It is only present in the Paksha, it is not present in the Sapaksa and in the Vipaksha. `Sound is eternal because it is audible'. * Anupasamhari: Here the hetu is non-exclusive. The hetu is all-inclusive and leaves nothing by way of sapaksha or vipaksha. e.g. 'All things are non-ternal, because they are knowable'.

* Satpratipaksa: Here the hetu is contradicted by another hetu. If both have equal force, then nothing follows. 'Sound is eternal, because it is audible', and 'Sound is non-eternal, because it is produced'. Here 'audible' is counterbalanced by 'produced' and both are of equal force. * Badhita: When another proof (as by perception) definitely contradicts and disproves the middle term (hetu). 'Fire is cold because it is a substance'. * Viruddha: Instead of proving something it is proving the opposite. 'Sound is eternal because it is produced'.


Upamāna (उपमान) means comparison and analogy. Upamana, states Lochtefeld, may be explained with the example of a traveller who has never visited lands or islands with endemic population of wildlife. He or she is told, by someone who has been there, that in those lands you see an animal that sort of looks like a cow, grazes like cow but is different from a cow in such and such way. Such use of analogy and comparison is, state the Indian epistemologists, a valid means of conditional knowledge, as it helps the traveller identify the new animal later. The subject of comparison is formally called upameyam, the object of comparison is called upamanam, while the attribute(s) are identified as samanya. Thus, explains Monier Williams , if a boy says "her face is like the moon in charmingness", "her face" is upameyam, the moon is upamanam, and charmingness is samanya. The 7th century text Bhaṭṭikāvya in verses 10.28 through 10.63 discusses many types of comparisons and analogies, identifying when this epistemic method is more useful and reliable, and when it is not. In various ancient and medieval texts of Hinduism, 32 types of Upanama and their value in epistemology are debated.


Śabda (शब्द) means relying on word, testimony of past or present reliable experts. Hiriyanna explains Sabda-pramana as a concept which means testimony of a reliable and trustworthy person (āptavākya). The schools of Hinduism which consider it epistemically valid suggest 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. He must rely on others, his parent, 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 proper knowledge is either spoken or written, but through Sabda (words). The reliability of the source is important, and legitimate knowledge can only come from the Sabda of reliable sources. The disagreement between the schools of Hinduism has been on how to establish reliability. Some schools, such as Carvaka , state that this is never possible, and therefore Sabda is not a proper pramana. Other schools debate means to establish reliability.

Testimony can be of two types, Vaidika (Vedic ), which are the words of the four sacred Vedas, and Laukika, or words and writings of trustworthy human beings. Vaidika testimony is preferred over Laukika testimony. Laukika-sourced knowledge must be questioned and revised as more trustworthy knowledge becomes available.


Each school of Hinduism has its own treatises on epistemology, with different number of Pramanas . For example, compared to Nyaya school's four pramanas, Carvaka school has just one (perception), while Advaita Vedanta school recognizes six means to reliable knowledge.


METAPHYSICS Nyaya- Vaisheshika offers one of the most vigorous efforts at the construction of a substantialist, realist ontology that the world has ever seen. It provides an extended critique of event-ontologies and idealist metaphysics. (...) This ontology is Platonistic, realistic, but neither exclusively physicalistic nor phenomenalistic. — Karl Potter , The Encyclopedia of Indian Philosophies

A cause is defined as an unconditional and invariable antecedent of an effect and an effect as an unconditional and invariable consequent of a cause. The same cause produces the same effect; and the same effect is produced by the same cause. The cause is not present in any hidden form whatsoever in its effect.

The following conditions should be met:

* The cause must be antecedent * Invariability * Unconditionality

Nyaya recognizes five kinds of accidental antecedents

* Mere accidental antecedent. E.g., The colour of the potter's cloth. * Remote cause is not a cause because it is not unconditional. E.g., The father of the potter. * The co-effects of a cause are not causally related. * Eternal substances, or eternal conditions are not unconditional antecedents, e.g. space. * Unnecessary things, e.g. the donkey of the potter.

Nyaya recognizes three kinds of cause:

* Samavayi, material cause, e.g. thread of a cloth. * Asamavayi, colour of the thread which gives the colour of the cloth. * Nimitta, efficient cause, e.g. the weaver of the cloth.


The Nyaya theory of error is similar to that of Kumarila's Viparita-khyati (see Mimamsa ). The Naiyyayikas also believe like Kumarila that error is due to a wrong synthesis of the presented and the represented objects. The represented object is confused with the presented one. The word 'anyatha' means 'elsewise' and 'elsewhere' and both these meanings are brought out in error. The presented object is perceived elsewise and the represented object exists elsewhere. They further maintain that knowledge is not intrinsically valid but becomes so on account of extraneous conditions (paratah pramana during both validity and invalidity).


Early Naiyyayikas wrote very little about Ishvara (literally, the Supreme Soul). Evidence available so far suggests that early Nyaya scholars were non-theistic or atheists. Later, and over time, Nyaya scholars tried to apply some of their epistemological insights and methodology to the question: does God exist? Some offered arguments against and some in favor.


In Nyayasutra's Book 4, Chapter 1, verses 19-21, postulates God exists, states a consequence, then presents contrary evidence, and from contradiction concludes that the postulate must be invalid.

The Lord is the cause, since we see that human action lacks results. This is not so since, as a matter of fact, no result is accomplished without human action. Since this is efficacious, the reason lacks force. —  Nyaya Sutra, IV.1.19 - IV.1.21

A literal interpretation of the three verses suggests that Nyaya school rejected the need for a God for the efficacy of human activity. Since human action and results do not require assumption or need of the existence of God, sutra IV.1.21 is seen as a criticism of the "existence of God and theism postulate". The context of the above verses includes various efficient causes. Nyayasutra verses IV.1.22 to IV.1.24, for example, examine the hypothesis that "random chance" explains the world, after these Indian scholars had rejected God as the efficient cause.


Udayana 's Nyayakusumanjali gave the following nine arguments to prove the existence of creative God:

* Kāryāt (lit. "from effect"): The world is an effect, all effects have efficient cause, hence the world must have an efficient cause. That efficient cause is God. * Āyojanāt (lit., from combination): Atoms are inactive. To form a substance, they must combine. To combine, they must move. Nothing moves without intelligence and source of motion. Since we perceive substance, some intelligent source must have moved the inactive atoms. That intelligent source is God. * Dhŗtyādéḥ (lit., from support): Something sustains this world. Something destroys this world. Unintelligent Adrsta (unseen principles of nature) cannot do this. We must infer that something intelligent is behind. That is God. * Padāt (lit., from word): Each word has meaning and represents an object. This representational power of words has a cause. That cause is God. * Pratyayataḥ (lit, from faith): Vedas are infallible. Human beings are fallible. Infallible Vedas cannot have been authored by fallible human beings. Someone authored the infallible Vedas. That author is God. * Shrutéḥ (lit., from scriptures): The infallible Vedas testify to the existence of God. Thus God exists. * Vākyāt (lit., from precepts): Vedas deal with moral laws, the rights and the wrongs. These are divine. Divine injunctions and prohibitions can only come from a divine creator of laws. That divine creator is God. * Samkhyāviśeşāt (lit., from the specialty of numbers): By rules of perception, only number "one" can ever be directly perceived. All other numbers other than one, are inferences and concepts created by consciousness. When man is born, his mind is incapable of inferences and concepts. He develops consciousness as he develops. The consciousness development is self-evident and proven because of man's ability with perfect numerical conception. This ability to conceive numerically perfect concepts must depend on something. That something is divine consciousness. So God must exist. * Adŗşţāt (lit., from the unforeseen): Everybody reaps the fruits of his own actions. Merits and demerits accrue from his own actions. An Unseen Power keeps a balance sheet of the merit and demerit. But since this Unseen Power is Unintelligent, it needs intelligent guidance to work. That intelligent guide is God.


The Naiyyayikas believe that the bondage of the world is due to false knowledge, which can be removed by constantly thinking of its opposite (pratipakshabhavana), namely, the true knowledge. So the opening aphorism of the Nyāya Sūtra states that only the true knowledge lead to niḥśreyasa (liberation). But the Nyaya school also maintains that the God's grace is essential for obtaining true knowledge. Jayanta , in his Nyayamanjari describes salvation as a passive stage of self in its natural purity, unassociated with pleasure, pain, knowledge and willingness.


The earliest text of the Nyāya School is the Nyāya Sūtra of Akṣapāda Gautama . The text is divided into five books, each having two sections. Vātsāyana 's Nyāya Bhāṣya is a classic commentary on the Nyāya Sūtra. Udyotakara 's Nyāya Vārttika (6th century CE) is written to defend Vātsāyana against the attacks made by Dignāga. Vācaspati Miśra 's Nyāyavārttikatātparyaṭīkā (9th century CE) is the next major exposition of this school. Two other texts, Nyāyaṣūcinibandha and Nyāyasūtraddhāra are also attributed to him. Udayana 's (984 CE) Nyāyatātparyapariśuddhi is an important commentary on Vācaspati's treatise. His Nyāyakusumāñjali is the first systematic account of theistic Nyāya. His other works include Ātmatattvaviveka, Kiraṇāvali and Nyāyapariśiṣṭa. Jayanta Bhatta 's Nyāyamañjari (10th century CE) is basically an independent work. Bhāsavarajña's Nyāyasāra (10th century CE) is a survey of Nyāya philosophy.

The later works on Nyāya accepted the Vaiśeṣika categories and Varadarāja's Tārkikarakṣā (12th century CE) is a notable treatise of this syncretist school. Keśava Miśra's Tārkabhaṣā (13th century CE) is another important work of this school.

Gangeśa Upādhyāya's Tattvacintāmaṇi (12th century CE) is the first major treatise of the new school of Navya-Nyāya . His son, Vardhamāna Upādhyāya's Nyāyanibandhaprakāśa (1225 CE), though a commentary on Udayana 's Nyāyatātparyapariśuddhi, incorporated his father's views. Jayadeva wrote a commentary on Tattvacintāmaṇi known as Āloka (13th century CE). Vāsudeva Sārvabhauma's Tattvacintāmaṇivyākhyā (16th century CE) is first great work of Navadvipa school of Navya-Nyāya . Raghunātha Śiromaṇi 's Tattvacintāmaṇidīdhiti and Padārthakhaṇḍana are the next important works of this school. Viśvanatha 's Nyāyasūtravṛtti (17th century CE) is also a notable work. The Commentaries on Tattvacintāmaṇidīdhiti by Jagadish Tarkalankar (17th century CE) and Gadadhar Bhattacharya (17th century CE) are the last two notable works of this school.

Annaṁbhatta (17th century CE) tried to develop a consistent system by combining the ancient and the new schools, Prācina nyāya and Navya-Nyāya and Vaiśeṣika to develop the nyāya-vaiśeṣika school. His Tarkasaṁgraha and Dīpikā are the popular manuals of this school.


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* Aksapada Gautama * Epistemology * Gautama Maharishi * Gautama * Hindu philosophy * Hinduism * Indian logic * List of teachers of Nyaya * Navya-Nyāya * Neti "not this", "neither this" (neti is sandhi from na-iti "not so"). * Padārtha * Tarka-Sangraha * Vaisesika


* ^ A B C nyAya Monier-Williams' Sanskrit-English Dictionary, Cologne Digital Sanskrit Lexicon, Germany * ^ A B C Nyaya: Indian Philosophy Encyclopædia Britannica (2014) * ^ B Gupta (2012), An Introduction to Indian Philosophy: Perspectives on Reality, Knowledge and Freedom, Routledge, ISBN 978-0415800037 , pages 171-189 * ^ PT Raju (1985), Structural Depths of Indian Thought: Toward a Constructive Postmodern Ethics, State University of New York Press, ISBN 978-0887061394 , page 223 * ^ A B C 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 * ^ A B C D DPS Bhawuk (2011), Spirituality and Indian Psychology (Editor: Anthony Marsella), Springer, ISBN 978-1-4419-8109-7 , page 172 * ^ A B C Gavin Flood , An Introduction to Hinduism, Cambridge University Press, ISBN 978-0521438780 , page 225 * ^ Vassilis Vitsaxis (2009), Thought and Faith, Somerset Hall Press, ISBN 978-1935244042 , page 131 * ^ BK Matilal (1997), Logic, Language and Reality: Indian Philosophy and Contemporary Issues, Motilal Banarsidass, ISBN 978-8120807174 , pages 353-357 * ^ A B Oliver Leaman (2006), Nyaya, in Encyclopaedia of Asian Philosophy, Routledge, ISBN 978-0415862530 , pages 405-407 * ^ Jeaneane Fowler (2002), Perspectives of Reality: An Introduction to the Philosophy of Hinduism, Sussex Academic Press, ISBN 978-1898723943 , page 129 * ^ A B B. K. Matilal "Perception. An Essay on Classical Indian Theories of Knowledge" (Oxford University Press, 1986), p. xiv.

* ^ KN Jayatilleke (2010), Early Buddhist Theory of Knowledge, ISBN 978-8120806191 , pages 246-249, from note 385 onwards; Steven Collins (1994), Religion and Practical Reason (Editors: Frank Reynolds, David Tracy), State Univ of New York Press, ISBN 978-0791422175 , page 64; Quote: "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 doctrine that human beings have no soul, no self, no unchanging essence."; Edward Roer (Translator), Shankara\'s Introduction, p. 2, at Google Books , pages 2-4 Katie Javanaud (2013), Is The Buddhist \'No-Self\' Doctrine Compatible With Pursuing Nirvana?, Philosophy Now; 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". * ^ BK Matilal (1997), Logic, Language and Reality: Indian Philosophy and Contemporary Issues, Motilal Banarsidass, ISBN 978-8120807174 , pages 354-355 * ^ David Ambeul (1998), Ontology in Indian Philosophy, in Routledge Encyclopedia of Philosophy (Editor: Edward Craig), Routledge, ISBN 978-0415073103 , pages 118-127 * ^ The Spectator at Google Books , Hindu Philosophy, Volume 32, page 1260 * ^ N Sinha (1990), The Nyaya Sutras of Gotama, Motilal Banarsidass, ISBN 978-8120807488 , see Introduction, pages i-ii * ^ A B David Christian (1 September 2011). Maps of Time: An Introduction to Big History. University of California Press. pp. 18–. ISBN 978-0-520-95067-2 . * ^ Kenneth Kramer (January 1986). World Scriptures: An Introduction to Comparative Religions. Paulist Press. pp. 34–. ISBN 978-0-8091-2781-8 . * ^ A B C D 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 * ^ A B C D E F G H I J Sharma, C. (1997). A Critical Survey of Indian Philosophy, Delhi: Motilal Banarsidass, ISBN 81-208-0365-5 , pp.209-10 * ^ G Jha (1919), Original atheism of the Nyaya, in Indian Thought - Proceedings and Transactions of the First Oriental Congress, Vol ii, pages 281-285 * ^ Dale Riepe (1979), Indian Philosophy Since Independence, Volume 1, BR Grüner Netherlands, ISBN 978-9060321133 , page 38 * ^ Sharma, C. (1997). A Critical Survey of Indian Philosophy, Delhi: Motilal Banarsidass, ISBN 81-208-0365-5 , p.192 * ^ Hiriyanna, M. (1993, reprint 2000). Outlines of Indian Philosophy, Delhi: Motilal Banarsidass, ISBN 81-208-1099-6 , pp.245,245n * ^ A B Chattopadhyaya, D. (1986), Indian Philosophy: A Popular Introduction, People's Publishing House, New Delhi, ISBN 81-7007-023-6 , p.163 * ^ James Lochtefeld, "Pramana" in The Illustrated Encyclopedia of Hinduism, Vol. 2: N-Z, Rosen Publishing. ISBN 0-8239-2287-1 , pages 520-521 * ^ Karl Potter (2002), Presuppositions of India's Philosophies, Motilal Banarsidass, ISBN 81-208-0779-0 , pages 25-26 * ^ Karl Potter and Sibajiban Bhattacharya (1994), The Encyclopedia of Indian Philosophies, Volume 6, Princeton University Press, ISBN 978-0691073842 , page 422 * ^ Karl Potter and Sibajiban Bhattacharya (1994), Logical Theory & Gangesa & Other chapters, in The Encyclopedia of Indian Philosophies, Volume 6, Princeton University Press, ISBN 978-0691073842 , page 69-81, 178-201, 462-466 * ^ Gerald Larson and Ram Bhattacharya, The Encyclopedia of Indian Philosophies (Editor:Karl Potter), Volume 4, Princeton University Press, ISBN 978-0691073019 , pages 361-362 * ^ A B C Troy Organ, Philosophy and the Self: East and West, Associated University Presse, ISBN 978-0941664806 , pages 91-94 * ^ A B Karl Potter (1977), Meaning and Truth, in Encyclopedia of Indian Philosophies, Volume 2, Princeton University Press, Reprinted in 1995 by Motilal Banarsidass, ISBN 81-208-0309-4 , pages 160-168 * ^ Karl Potter (1977), Meaning and Truth, in Encyclopedia of Indian Philosophies, Volume 2, Princeton University Press, Reprinted in 1995 by Motilal Banarsidass, ISBN 81-208-0309-4 , pages 168-169 * ^ Karl Potter (1977), Meaning and Truth, in Encyclopedia of Indian Philosophies, Volume 2, Princeton University Press, Reprinted in 1995 by Motilal Banarsidass, ISBN 81-208-0309-4 , pages 170-172 * ^ A B C Sharma, A Critical Survey of Indian Philosophy, Delhi: Motilal Banarsidass, ISBN 81-208-0365-5 , pages192-196 * ^ A B James Lochtefeld, "Upamana" in The Illustrated Encyclopedia of Hinduism, Vol. 2: N-Z, Rosen Publishing. ISBN 0-8239-2287-1 , page 721 * ^ A B Monier Williams (1893), Indian Wisdom - Religious, Philosophical and Ethical Doctrines of the Hindus, Luzac * 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

* ^ A B C M. Hiriyanna (2000), The Essentials of Indian Philosophy, Motilal Banarsidass, ISBN 978-8120813304 , page 43 * ^ P. Billimoria (1988), Śabdapramāṇa: Word and Knowledge, Studies of Classical India Volume 10, Springer, ISBN 978-94-010-7810-8 , pages 1-30 * ^ Karl Potter (2004), The Encyclopedia of Indian Philosophies: Indian metaphysics and epistemology, Volume 2, Motilal Banarsidass, ISBN 978-8120803091 , page 1 * ^ John Clayton (2010), Religions, Reasons and Gods: Essays in Cross-cultural Philosophy of Religion, Cambridge University Press, ISBN 978-0521126274 , page 150 * ^ G Oberhammer (1965), Zum problem des Gottesbeweises in der Indischen Philosophie, Numen, 12: 1-34

* ^ A B C Original Sanskrit: Nyayasutra Anand Ashram Sanskrit Granthvali, pages 290-292; 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 * ^ Dasgupta, Surendranath (1975). A History of Indian Philosophy, Vol. I, Delhi: Motilal Banarsidass, ISBN 978-81-208-0412-8 , p.365 * ^ Sharma, C. (1997). A Critical Survey of Indian Philosophy, Delhi: Motilal Banarsidass, ISBN 81-208-0365-5 , p.208 * ^ Dasgupta, Surendranath (1975). A History of Indian Philosophy, Vol. I, Delhi: Motilal Banarsidass, ISBN 978-81-208-0412-8 , p.366 * ^ Radhakrishnan, S. Indian Philosophy, Vol. II, Oxford University Press, New Delhi, 2006, ISBN 0-19-563820-4 , pp.36-40 * ^ Radhakrishnan, S. Indian Philosophy, Vol. II, Oxford University Press, New Delhi, 2006, ISBN 0-19-563820-4 , p.40 * ^ A B Radhakrishnan, S. Indian Philosophy, Vol. II, Oxford University Press, New Delhi, 2006, ISBN 0-19-563820-4 , p.41


* Karl Potter, Indian metaphysics and epistemology : the tradition of Nyāya-Vaiśeṣika up to Gaṅgeśa, Princeton University Press, OCLC 3933891 * Stephen Phillips, Epistemology in classical India : the knowledge sources of the Nyāya school, Routledge, ISBN 978-0415895545 , OCLC 701015636 * Arthur Keith, Indian logic and atomism: an exposition of the Nyāya and Vaiçeṣika systems, Greenwood Press, OCLC 451428 * Bimal Matilal (1977), A History of Indian Literature - Nyāya-Vaiśeṣika, Otto Harrassowitz Verlag, ISBN 978-3447018074 , OCLC 489575550 * Gopi Kaviraj (1961), Gleanings from the history and bibliography of the Nyaya- Vaisesika literature, Indian Studies: Past the semantics and ontology of negative statements, Harvard University Press, OCLC 606911358 * Daniel H.H. Ingalls , Materials for the study of Navya-nyāya logic, Harvard University Press, OCLC 1907221


* Epistemology in Classical Indian Philosophy Stanford Encyclopedia of Philosophy, Stanford University * Navya-Nyāya philosophy Stanford Encyclopedia of Philosophy, Stanford University * Lectures on Nyaya THE OXFORD CENTRE FOR HINDU STUDIES, Oxford University * "Nyaya". Internet Encyclopedia of Philosophy .

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