  Aristotle challenges the opponent to signify some one thing both to himself and to another, for example, “human being”. Aristotle explains that the word chosen by the opponent can have several meanings, provided one definition can be assigned to each and each definition is assigned a different word. Aristotle says that the word may not have infinitely many meanings. Perhaps this is because otherwise the opponent can keep on saying that we have not yet reached the meaning she has in mind, or perhaps Aristotle envisages infinitely branching meanings, so that we will never arrive at anything definite.