to exist in our minds both as true and false.

THEAETETUS: How so?

STRANGER: You will know better if you first gain a knowledge of what

they are, and in what they severally differ from one another.

THEAETETUS: Give me the knowledge which you would wish me to gain.

STRANGER: Are not thought and speech the same, with this exception, that

what is called thought is the unuttered conversation of the soul with

herself?

THEAETETUS: Quite true.

STRANGER: But the stream of thought which flows through the lips and is

audible is called speech?

THEAETETUS: True.

STRANGER: And we know that there exists in speech...

THEAETETUS: What exists?

STRANGER: Affirmation.

126

Sophist