Do you know that I am your father?
What quibble can you make upon that?
SPEUSIPPUS.

Do I know that you are my father?
Let us take the question to pieces, as Melesigenes would say.

First, then, we must inquire what is knowledge?
Secondly, what is a father?
Now, knowledge, as Socrates said the other day to Theaetetus (See Plato's Theaetetus.)-- CALLIDEMUS.

Socrates! what! the ragged flat-nosed old dotard, who walks about all day barefoot, and filches cloaks, and dissects gnats, and shoes (See Aristophanes; Nubes, 150.) fleas with wax?
SPEUSIPPUS.

All fiction! All trumped up by Aristophanes! CALLIDEMUS.