BOY: Yes.

SOCRATES: And how many are twice two feet? count and tell me.

BOY: Four, Socrates.

SOCRATES: And might there not be another square twice as large as this,
and having like this the lines equal?

BOY: Yes.

SOCRATES: And of how many feet will that be?

BOY: Of eight feet.

SOCRATES: And now try and tell me the length of the line which forms the
side of that double square: this is two feet--what will that be?

BOY: Clearly, Socrates, it will be double.

SOCRATES: Do you observe, Meno, that I am not teaching the boy anything,
but only asking him questions; and now he fancies that he knows how long a
line is necessary in order to produce a figure of eight square feet; does
he not?

MENO: Yes.

SOCRATES: And does he really know?

MENO: Certainly not.