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Sign and Symbol

Key terms
What a sign is
How words mean
Signs in nature and religion
Reading signs

Natural and conventional signs

What makes something a sign of something else? A sign is a thing that brings another thing to mind, and it may do so by nature, as smoke signals fire, or by agreement, as a word signals a meaning. These readings ask which signs are natural, which are conventional, and how we tell them apart.

3 readings

Plato’s Cratylus is the dialogue on the “correctness” of names, and it opens with Hermogenes reporting the view of Cratylus to Socrates. Cratylus holds that names are “natural and not conventional”, while Hermogenes takes the other side. The passage stands under “Key terms” as the statement of the question.

In Book II, chapters 1–2 of Augustine’s On Christian Doctrine, he defines a “sign” as a thing which causes “something else to come into the mind” and goes on to divide signs into natural and given. The work, begun in 396 and finished in 426, is a treatise on interpreting and teaching Scripture. The passage stands under “Key terms” for the definition.

In section 65 of Berkeley’s Principles of Human Knowledge of 1710, he replies to an objection about the order of nature. He says the connexion of ideas does not imply “cause and effect”, but “a mark or sign with the thing signified”. Berkeley was later Bishop of Cloyne. The passage stands under “Key terms” for that account.