SOCRATES: And are there not here four equal lines which contain this space?
BOY: There are.
SOCRATES: Look and see how much this space is.
BOY: I do not understand.
SOCRATES: Has not each interior line cut off half of the four spaces?
BOY: Yes.
SOCRATES: And how many spaces are there in this section?
BOY: Four.
SOCRATES: And how many in this?
BOY: Two.