 First, Heytesbury introduces the concept of implied meaning (significare ex consequenti) and believes that sentential meaning is closed under entailment. As he explains the different senses of “signifying precisely” (significare precise), he claims that a sentence cannot signify something precisely in the sense of not signifying anything else. Instead, “to signify precisely” means that a sentence has a “primary meaning” (“significat primo et principaliter” or “significatio primaria et adequata”) plus whatever its primary meaning entails (quod sequitur ipsam significantem quod ita sit), but nothing else ([RSS] 1494: fol. 15ra–rb [1988b:  459–460]).[31]  To allow that, Heytesbury’s semantics must validate some version of the Bradwardinian sentential  semantics.[32]