Part 42

STRANGER: 'Theaetetus sits'--not a very long sentence.

THEAETETUS: Not very.

STRANGER: Of whom does the sentence speak, and who is the subject? that is what you have to tell.

THEAETETUS: Of me; I am the subject.

STRANGER: Or this sentence, again--

THEAETETUS: What sentence?

STRANGER: 'Theaetetus, with whom I am now speaking, is flying.'

THEAETETUS: That also is a sentence which will be admitted by every one to speak of me, and to apply to me.

STRANGER: We agreed that every sentence must necessarily have a certain quality.

THEAETETUS: Yes.

STRANGER: And what is the quality of each of these two sentences?

THEAETETUS: The one, as I imagine, is false, and the other true.

STRANGER: The true says what is true about you?

THEAETETUS: Yes.

STRANGER: And the false says what is other than true?

THEAETETUS: Yes.

STRANGER: And therefore speaks of things which are not as if they were?

THEAETETUS: True.

STRANGER: And say that things are real of you which are not; for, as we were saying, in regard to each thing or person, there is much that is and much that is not.

THEAETETUS: Quite true.

STRANGER: The second of the two sentences which related to you was first of all an example of the shortest form consistent with our definition.

THEAETETUS: Yes, this was implied in recent admission.

STRANGER: And, in the second place, it related to a subject?

THEAETETUS: Yes.

STRANGER: Who must be you, and can be nobody else?

THEAETETUS: Unquestionably.

STRANGER: And it would be no sentence at all if there were no subject, for, as we proved, a sentence which has no subject is impossible.

THEAETETUS: Quite true.