The grammatical category of evidentiality is traditionally defined as marking evidence type or related concepts (Anderson 1986, Willett 1988, Aikhenvald 2004). I argue against this received view as I show that evidential morphemes in Bulgarian mark the temporal distance between the time at which the speaker learned the described proposition and the topic time. I also demonstrate that Bulgarian evidentials represent projective/backgrounded content that is informative but does not affect the described proposition, which is plainly entailed. The latter fact especially has important typological and theoretical consequences. The proposal is formalized in a logic that extends Dynamic Predicate Logic by adding propositional variables (cf. AnderBois et al. 2010).