Nyaya and Vaisheshika: Logic and Atoms
The Nyaya school of logic and the Vaisheshika school of atomism: their theories of knowledge, the five-step syllogism, the categories of reality and their arguments for God.
Nyaya and Vaisheshika are two closely related schools of Hindu philosophy. Nyaya is the school of logic and reasoning, concerned with how we can know anything reliably. Vaisheshika is a school of natural philosophy, which analyses the world into basic categories and teaches that matter is made of indivisible atoms. Over time the two merged into a single tradition, which produced some of India's most rigorous philosophy.
Nyaya: the school of logic
The word nyaya means “rule”, “method” or “logical argument”. The school's root text is the Nyaya Sutras, attributed to Gautama (also called Akshapada) and probably compiled in the early centuries CE.
Four sources of knowledge
Nyaya accepts four valid means of knowledge (pramanas): perception, inference, comparison and reliable testimony, including the testimony of the Vedas. It devotes great attention to analysing each, and to identifying the errors and fallacies that lead to false belief.
The five-step argument
Nyaya developed a standard form of argument with five steps. The classic example is:
- Thesis: The hill has fire.
- Reason: Because it has smoke.
- Example: Wherever there is smoke, there is fire, as in a kitchen.
- Application: This hill has smoke, which is always accompanied by fire.
- Conclusion: Therefore the hill has fire.
The key to valid inference is the invariable relationship (vyapti) between the reason and what is to be proved, here between smoke and fire.
Vaisheshika: the categories of reality
The name vaisheshika comes from vishesha, “particularity”, the feature that makes each ultimate thing distinct. Its root text, the Vaisheshika Sutras, is attributed to the sage Kanada.
Vaisheshika analyses everything that exists into categories (padarthas):
| Category | Meaning |
|---|---|
| Dravya | Substance |
| Guna | Quality, such as colour or taste |
| Karma | Motion or action |
| Samanya | Universal, such as “cowness” |
| Vishesha | Particularity |
| Samavaya | Inherence, the relation between a quality and its substance |
| Abhava | Absence or non-existence (added later) |
There are nine substances: earth, water, fire, air, ether (akasha), time, space, the self and the mind.
Atomism
Vaisheshika teaches that earth, water, fire and air are made of eternal, indivisible atoms (paramanu). Atoms combine in pairs and triads to form the visible world. The name Kanada is sometimes explained as “atom-eater”, from kana, “particle”.
The combined school
From around the 10th century, Nyaya and Vaisheshika were taught as a single system. In the 14th century, the logician Gangesha founded Navya-Nyaya (“new logic”), developing a precise technical language for analysing concepts. Navya-Nyaya became the standard language of scholarly debate across many Indian disciplines, including law and grammar.
Arguments for God
Nyaya-Vaisheshika thinkers developed formal arguments for the existence of God (Ishvara). The best known are those of Udayana (10th–11th century), who argued, for example, that the world, being composed of parts, must have an intelligent maker, just as a pot must have a potter. These arguments were debated with Buddhist and Mimamsa philosophers who denied a creator.
Liberation
For Nyaya-Vaisheshika, the self is a substance that becomes conscious only when connected with a mind and body. Liberation (moksha) is achieved through correct knowledge of reality and is the permanent end of all suffering: a state free of pain, though also, critics noted, free of pleasure and awareness.
Sources and further reading
- Bimal Krishna Matilal, Perception: An Essay on Classical Indian Theories of Knowledge (Oxford University Press, 1986).
- Jonardon Ganeri, Philosophy in Classical India (Routledge, 2001).
- Karl H. Potter (ed.), Encyclopedia of Indian Philosophies, vol. 2: Nyaya-Vaisesika (Princeton University Press, 1977).