The Nyaya school of Indian philosophy, founded by Gautama, places great importance on perception as a means of acquiring knowledge. According to Nyaya, perception is the direct and immediate apprehension of an object through the senses.

In Indian philosophy, 'pramana' is a Sanskrit term that means 'proof' or 'means of knowledge'. It refers to the various methods or sources through which valid knowledge can be acquired.

The Nyaya school of Indian philosophy, founded by Gautama, employs the method of 'anvaya-vyatireka' to establish causal relationships. This method involves observing the presence or absence of a cause and its effect in different instances.

The Mimamsa school of Indian philosophy, founded by Jaimini, considers the Vedas as the primary source of knowledge. The Vedas are regarded as sacred texts that contain revealed knowledge about various aspects of life and the universe.

In Indian philosophy, 'sruti' is a Sanskrit term that means 'heard' or 'revealed'. It refers to the knowledge that is believed to have been revealed by divine sources, such as the Vedas.

Advaita Vedanta, a school of Indian philosophy founded by Adi Shankara, emphasizes the role of intuition and direct experience as a means of acquiring knowledge. According to Advaita Vedanta, the ultimate reality is Brahman, which can be directly experienced through meditation and self-inquiry.

In Indian philosophy, 'smriti' is a Sanskrit term that means 'remembered' or 'tradition'. It refers to the knowledge that is derived from memory, experience, or oral tradition, as opposed to revealed knowledge (sruti).

The Nyaya school of Indian philosophy, founded by Gautama, employs the theory of 'apoha' or 'negation' as a means of defining concepts. According to this theory, a concept is defined by negating its opposite qualities.

In Indian philosophy, 'tarka' is a Sanskrit term that means 'logical reasoning' or 'argumentation'. It refers to the process of using logical principles and arguments to establish the validity of a claim or proposition.

The Mimamsa school of Indian philosophy, founded by Jaimini, places great importance on language and grammar in the acquisition of knowledge. According to Mimamsa, the Vedas are composed in perfect language, and their interpretation requires a deep understanding of grammar and linguistics.

In Indian philosophy, 'anumana' is a Sanskrit term that means 'inference' or 'deduction'. It refers to the process of deriving new knowledge from existing knowledge through logical reasoning.

The Vaisheshika school of Indian philosophy, founded by Kanada, propounds the theory of 'satkaryavada' or 'the effect exists in the cause'. According to this theory, the effect is pre-existent in the cause in a subtle form and is manifested under appropriate conditions.

In Indian philosophy, 'abhava' is a Sanskrit term that means 'non-existence' or 'absence'. It refers to the state of something not existing or being absent.

The Nyaya school of Indian philosophy, founded by Gautama, places great importance on doubt and critical inquiry in the pursuit of knowledge. According to Nyaya, knowledge should be subjected to rigorous examination and scrutiny to ensure its validity.

In Indian philosophy, 'samaya' is a Sanskrit term that means 'convention' or 'agreement'. It refers to the knowledge that is derived from social conventions, customs, or traditions.