 Aspectual verbs describe a transition from one state to another, and it is always the first state that is presupposed, as standard projection tests confirm. An explanation might be sought in the idea that interlocutors are more interested in where the story is going than where it came from, and therefore tend to take the past as given. A purely pragmatic analysis might involve the hearer reasoning that since the speaker is likely to intend to provide the information that is of greatest interest, they are probably assuming a context in which the pre-state associated with a telic sentence is already in the common ground, i.e. presupposed. It might further be argued that such reasoning only applies when the hearer has reason to think that the speaker has expertise on the situation being described. A part-time trigger analysis might be based on the idea that the regularity with which pre-states of telic sentences are in the common ground has led to this pragmatic reasoning being conventionalized. A part-time trigger analysis might involve a special triggering condition, e.g. involving the speaker’s expertise. So the part-time trigger analysis might amount to the claim that when the context determines that the speaker has expertise about an event, the pre-state is presupposed, but when the context determines that the speaker lacks expertise, there is no such presupposition.