To expand on this just a bit:
I know a million things. There are many more things that I do not know. One of the things I don’t know is: How many of the things I think I know do I really know? It gets worse. There are things that I do know that I don’t think I know. There are things that I don’t think I know that I do know. Included in the things that I think I know that I really don’t, are a number of things that I don’t even know I don’t know. This, now, is where it gets tricky. What do I not know that I really do know but won’t admit? And of those things that I won’t admit I know, what do I really know? Because there are a lot of things that I think I know that it turns out that not only did I not know them, I didn’t even know that I didn’t know them. I don’t know if I can handle any more of this sort of introspection. Really not much can come of it. All I know is that there is a whole bunch that I don’t know and even more that I don’t know I don’t know. What gets me though, are the things that I know I know that I wish I didn’t know. Those are the worst.