SOCRATES: And would you call the two processes by the same name, when there is so great a difference between them?
THEAETETUS: That would certainly not be right.
SOCRATES: And what name would you give to seeing, hearing, smelling, being cold and being hot?
THEAETETUS: I should call all of them perceiving—what other name could be given to them?
SOCRATES: Perception would be the collective name of them?
THEAETETUS: Certainly.
SOCRATES: Which, as we say, has no part in the attainment of truth any more than of being?
THEAETETUS: Certainly not.
SOCRATES: And therefore not in science or knowledge?
THEAETETUS: No.