Imagine that for some reason you could know anything you wanted to know, and all you have to do is ask. (Maybe some highly advanced alien or supernatural entity tells you the answer to anything you ask. Maybe you have a friend who somehow has the means/technology/ability to rapidly and definitively answer questions that were once impossible to answer. Etc.) The answer you get will always be the correct answer—or if you prefer, you’ll always be provided with a means to verify the answer, and the answer is always shown to be true.

Is there anything you wouldn’t want to ask? Is there anything you would rather be wrong or uncertain about than know?