Ishvarakrishna — Author of the Samkhya Karika
Date disputed; usually placed in the early centuries CE · disputed · disputed
Dating rests on later commentary and translation history
Unknown or disputed.
Passage not yet recorded.
Psychology and study of mind · CBSE · IGCSE · IB — Perception, cognition and error, attention and its training, memory, personality types, the states of waking, dream and sleep.
Evidence: traditionally attributed · no modern scholarly reference recorded yet.