Knowing and Not Knowing

Well, Socrates claimed he knew nothing.  That was his only wisdom.  Of course, all that was Socratic irony, Socrates knew better.  On the other hand, there was Metrodorus of Chios.  I kind of like the fellow.  He said “None of us knows anything, not even this, whether we know or we do not know; nor do we know what ‘to not know’ or ‘to know’ are, nor on the whole, whether anything is or is not.”  from Cicero, see the SEP, on “Ancient Skepticism.”