The challenge is what we now call Meno’s paradox, or the learner’s paradox. It goes like this: either you know something or you don’t. If you know it, you don’t need to inquire into it, since you already know it. If you don’t know it, then you do need to inquire into it. But how can you? After all, you don’t know what it is. So how will you go about searching for it, and for that matter, how will you recognize it if you do come across it

