Geodick,

Your logic reminds me of something from Mark Twain. I can't recall it verbatim, but this'll be close enough I think.

Fellow was telling a tale about a buffalo climbing a tree. One of the listeners said, "Hey, buffalos can't climb trees!" The narrator of the story queried, "Have you ever seen a buffalo climb a tree?" Fellow replied, "No." Narrator said, "Well then, how do you know they can't?"

Twain at least knew he was being funny.