No More Learning

And yet many more admissions were made by
us than could be fairly granted; for we           that there was a
science of science, although the argument said No, and protested against
us; and we admitted further, that this science knew the works of the
other sciences (although this too was denied by the argument), because
we wanted to show that the wise man had knowledge of what he knew
and did not know; also we nobly disregarded, and never even considered,
the impossibility of a man knowing in a sort of way that which he
does not know at all; for our assumption was, that he knows that which
he does not know; than which nothing, as I think, can be more irrational.