 Some plausible arguments indicate that we would not. To adopt an example from Quine (1970 [1986], pp. 8–9), let’s assume that the set of animals with hearts (which Quine, for convenience, calls “cordates” – not to be confused with “chordates”) is the same as the set of animals with kidneys (which Quine calls “renates”). Now, consider the pair of sentences: