sentences:  An equivocation is a variation in meaning — a manifold of sign senses — such that, as Aristotle put it about names in the opening of "" (1.1a1–12), "Things are said to be named ‘equivocally’ when, though they have a common name, the definition corresponding with the name differs for each".So Peirce's claim that three categories are sufficient amounts to an assertion that all manifolds of meaning can be unified in just three steps.The following passage is critical to the understanding of Peirce's Categories