ABSTRACT
This chapter determines the exact scope and meaning of Epicurus’ claim that all perceptions are true. I first argue that this contention refers to all kinds of impressions, including not only sense perceptions but also hallucinations, dreams and any type of mental image. Then, I point out that Epicurus employs at least two distinct conceptions of truth. The first conception applies to impressions and implies both existence and evidence. The second conception refers to opinions and entails a coherence model of truth that is based both on the ordering activity of the understanding and Epicurus’ atomistic foundation of perception.
