Gore has "Indisputable Evidence"

Gore to publish book on global warming

People say there's "indisputable evidence" of global warming, yet I'm old enough to remember that during the 1980's the "indisputable evidence" was that manmade emissions were going to bring about the next Ice Age. 10 years later, without any explanation, it became "global warming." So which is it? Which set of "indisputable evidence" is actually "indisputable"?

It reminds me of The Princess Bride where one character says to another: "You keep using that word, but I do not think it means what you think it means."