Cratylus

Cratylus is the name of a dialogue by Plato. Most modern scholars agree that it was written mostly during Plato's so-called middle period. In the dialogue, Socrates is asked by two men, Cratylus and Hermogenes, to tell them whether names are 'conventional' or 'natural', that is, whether language is a system of arbitrary signs or whether words have an intrinsic relation to the things they signify.