In Jeopardy

It's the same dream, or more like a nightmare.  I'm on a quiz panel of some sort, probably akin to my Charm City days, and I have to answer a question.  A lot depends on my answer, for reasons that are not clear.  I feel really inadequate and unprepared, because much like the late Spaulding Gray, I only know twenty things, and what are the odds that, out of millions of potential questions, one will be in the category of the twenty things I know?