 Verse 5 of Samkhya-karika defines perception as the immediate knowledge one gains by the interaction of sense organ with anything; inference, it defines as the knowledge one gains based on meditation on one's perception; and testimony as that knowledge one gains from the efforts of those one considers as a reliable source; it then succinctly asserts that there are three types of inferences for the epistemic quest of man, without explaining what these three types of inferences are.Verse 6 asserts that objects can be known either through sensory organs or through super-sense (inner derivation from observations).Verse 7 of the "Karika" states that perception alone is not sufficient means to know objects and principles behind observed reality, certain existent things are not perceived and are derived.