Jim Fallows notes that that thing about how if you put a frog in a pot of water and slowly raise it to a boil the frog won't jump out
happens to be false, which is too bad because it's a useful analogy for explaining a range of real-world phenomena. He's considering offering a prize to whoever can come up with the best replacement analogy, so have at it.
This article available online at:
http://www.theatlantic.com/politics/archive/2007/10/the-inconvenient-truth/46516/