Here's one to put to those who interpret everything Chazal say literally...
When Rashi says (in Parshas Viyigash) that Eretz Yisroel is higher than all other lands, does this mean that the elevation of Eretz Yisroel is higher than the Himilayas?
If they answer in the negative, then they're admitting that (at least the Rishonim) didn't have perfect knowledge of the world. If they answer in the affirmative, you know they might be right... because the lack of oxygen up there has surely done something to their brains.
The Wolf (feeling a little impish today)