SOC. Let us, then, take them up and examine them, or rather, let us examine ourselves and see whether it was in accordance with this theory, or not, that we learned letters. First then, the syllables have a rational explanation, but the letters have not?

THEAET. I suppose so.

SOC. I think so, too, decidedly. Now if anyone should ask about the first syllable of Socrates; Theaetetus, tell me, what is SO? What would you reply?

THEAET. I should say S and O.

SOC. This, then, is your explanation of the syllable?

THEAET. Yes.

SOC. Come now, in the same manner give me the explanation of the S.

THEAET. How can one give any elements of an element? For really, Socrates, the S is a voiceless letter, The distinction here made is that which we make between vowels and consonants. The seven Greek vowels are α, ε, η, ι, ο, υ, ω called φωνήεντα. a mere noise, as of the tongue hissing; B again has neither voice nor noise, nor have most of the other letters; and so it is quite right to say that they have no explanation, seeing that the most distinct of them, the seven vowels, have only voice, but no explanation whatsoever.

SOC. In this point, then, my friend, it would seem that we have reached a right conclusion about knowledge.

THEAET. I think we have.

SOC. But have we been right in laying down the principle that whereas the letter is unknowable, yet the syllable is knowable?

THEAET. Probably.

SOC. Well then, shall we say that the syllable is the two letters, or, if there be more than two, all of them, or is it a single concept that has arisen from their combination?

THEAET. I think we mean all the letters it contains.

SOC. Now take the case of two, S and O. The two together are the first syllable of my name. He who knows it knows the two letters, does he not?

THEAET. Of course.

SOC. He knows, that is, the S and the O.

THEAET. Yes.

SOC. How is that? He is ignorant of each, and knowing neither of them he knows them both?

THEAET. That is monstrous and absurd, Socrates.

SOC. And yet if a knowledge of each letter is necessary before one can know both, he who is ever to know a syllable must certainly know the letters first, and so our fine theory will have run away and vanished!

THEAET. And very suddenly, too.

SOC. Yes, for we are not watching it carefully. Perhaps we ought to have said that the syllable is not the letters, but a single concept that has arisen from them, having a single form of its own, different from the letters.

THEAET. Certainly; and perhaps that will be better than the other way.

SOC. Let us look into that; we must not give up in such unmanly fashion a great and impressive theory.

THEAET. No, we must not.