Table 4.

Tool to understand knowledge and its application at various levels as explained in Ayurveda philosophy.

Tools of knowledge	Level of application
Aptopadesa: Knowledge through teachings of seers who are one with nature	Tattva (principle) and Vyavahara (practice)
Anumana: Knowledge through inference including Yukti – causal relations, and Upamaan – comparative reasoning	Sastra (codification of knowledge – science)
Pratyaksa: Knowledge through direct perception including yogaja pratyaksa or intuitive cognition	Vyavahara (practice) and Tattva (principles)