Abstract: Paul Boghossian defends a meaning-based approach to the apriority of the propositions of logic. His model is based on the idea that the logical constants are implicitly defined by some of the axioms and inference rules in which they are involved, thereby offering an alternative to those theories that deny that grasp of meaning can contribute to the explanation of a thinker's entitlement to a particular type of transition or belief.

Keywords: apriority, axioms, Paul Boghossian, implicit definition, inference rules, logic, logical constants, propositions,