Free Republic

"If all you have is a hammer," the old saying goes, "everything looks like a nail." Left unsaid is the fact that the real problem isn't the possession of a hammer, but the certitude that all you need is the hammer. In other words, it's a failure of the imagination -- which is a kind of arrogance -- that's really to blame. "I've got my hammer, and that's all I need. Besides, have you ever seen a problem that didn't look like a nail?" This is a version of what academics call "confirmation bias" -- the tendency to accept only...