 Noun phrases like a pig, every pig, and Babe, behave in many respects syntactically alike: they can occur in the same positions, can be conjoined, etc. But a uniform semantics seems problematic. There were proposals which said that every pig denotes the universally generic pig, and a pig an arbitrary pig. Such proposals were famously rejected by Lewis (1970), who raised, for instance, the question which would be the color of the universal pig, all colors, or would it be colorless?