Nyaya
200 BCE – 1700 c.
A theory of how knowledge is acquired and how arguments are evaluated, built by people who thought bad reasoning was the actual cause of suffering.
- Active
- 200 BCE – 1700
- Where
- Northern India, especially Mithila and Bengal
- Also
- न्याय Nyāya
- Status
- extinct as a school
- Tradition
- Indian
The claim
There are exactly four ways of knowing: perception, inference, comparison and reliable testimony. Anything presented as knowledge must come through one of them or it is not knowledge.
What it held
Nyaya is the Indian tradition's epistemology and logic, and it is realist throughout: there is a world, it has the structure we take it to have, and our cognitions are true when they correspond to it.
The machinery is the five-membered inference, and it differs from the syllogism in a way worth noticing. There is a hill with smoke on it; where there is smoke there is fire, as in a kitchen; this hill has smoke; therefore fire. The third and fourth members are an example and its application — a real case, not a formal quantifier. Nyaya inference is about the world rather than about form.
Everything then turns on the pervasion relation: what entitles you to say wherever smoke, there fire. Establishing pervasion without circularity occupied the school for fifteen centuries and is where the hard work is.
The soteriology is startling to Western readers. The Nyaya Sutra opens by listing what liberation requires and puts knowledge of these logical categories first — bad reasoning produces false belief, false belief produces attachment, attachment produces suffering. Logic is a spiritual discipline.
How it argued
Formal debate with agreed rules, including a taxonomy of legitimate refutations and of fallacies — the school catalogued the ways an argument can go wrong more thoroughly than anyone before Frege.
What it was arguing against
Buddhist momentariness and the denial of a self; Advaita's claim that the world is illusory; and any epistemology admitting fewer or more than four sources of knowledge.
Where it disagreed with itself
How pervasion is established. Whether absence is a real thing you can perceive — Nyaya said yes, which is unusual and philosophically consequential.
Common misconceptions
That Indian logic is a version of Aristotle's. The five-membered inference includes an example precisely because it is not formal, and the tradition developed independently.
How it began
Attributed to Gautama, also called Akshapada. The sutras are a compilation and the tradition of formal debate they codify is older.
What became of it
Merged with Vaisheshika into a combined school, then transformed into Navya-Nyaya, which is where its most technical work was done.
Lasting influence
Every Indian school had to argue in Nyaya's terms, including those that rejected its conclusions. Buddhist logic developed largely in response to it.
Why it still matters
Its treatment of testimony as a distinct source of knowledge is a position Western epistemology only took seriously in the last forty years.
Put another way
Smoke on a distant hill, and everything that has to be true for you to be sure of the fire.
Where to start
A modern account of the five-membered inference first. The sutras are almost unreadable without the framework.
The surprising bit
Debate was a public institution with stakes. Losing a formal debate could mean losing patronage, a monastery, or your students — which is one reason the rules were codified so precisely.
In their own words
The hill has fire, because it has smoke, like a kitchen.
Pain, birth, activity, fault and false knowledge — on the removal of these in turn there is release.
Connections
- Opposed by
- Madhyamaka Buddhism, Advaita Vedanta, Carvaka (Lokayata)
- Influenced
- Navya Nyaya
The verdict
The most rigorous epistemology produced before the modern period, in a tradition that treated it as a path to liberation.