What holes do I have in my knowledge?

The idea of being on a game show scares me. In general, I think I could do pretty well on many of them, but I fear missing an easy question that “everyone” knows.

A great example is this poor guy on Wheel of Fortune years ago. He seems to be a sharp guy, but somehow just didn’t know how to pronounce the word “achilles”. It happens. For whatever reason, that particular word (that most of us know)…