"Three Dialogues between Hylas and Philonous" is a book written by George Berkeley in 1713.

Three important concepts discussed in the Three Dialogues are perceptual relativity, the conceivability/master argument, and Berkeley's phenomenalism.

George Berkeley (12 March 1685 – 14 January 1753) — known as Bishop Berkeley (Bishop of Cloyne) — was an Anglo-Irish philosopher whose primary achievement was the advancement of a theory he called "immaterialism" (later referred to as "subjective idealism" by others).