Today’s Zippy involves a distinction in the interpretation of the VP own thirty-one muu-muus:
Does Zippy happen to own (only) 31 muu-muus at the moment? Griffy asks how many muu-muus Zippy owns, and that’s what Zippy apparently says in reply.
Or is Zippy’s way of life such that he always has (only) 31 muu-muus in his possession? That would indeed predict that Zippy has (only) 31 at the moment, but it would also predict that if you took one away, he’d have to get a new one to replace it, and that if you gave him a new one, he’d have to get rid of an old one — all to maintain the stable state of owning 31 muu-muus. That’s what Zippy says in his reply.
The distinction is aspectual, corresponding very roughly to the circumstances in which you’d choose a ‘to be’ verb in Spanish: estar (roughly) for temporary situations, not necessarily extending beyond the reference time period (hence mutable, contingent), ser (roughly) for enduring, even permanent situations, extending through time before and after the reference time period (hence unchanging, even necessary).
