Any time Paul Krugman uses the phrase "I'm feeling optimistic" in his first sentence is cause for celebration. That's what he does in today's op-ed about the climate summit in Copenhagen. (More cause for celebration: free sex for all attending diplomats!) By the end of the piece, he's really eating happy pills. "Let's hope my optimism about Copenhagen is justified. A deal there would save the planet at a price we can easily afford-and it would actually help us in our current economic predicament." Great! But shouldn't that be, "a deal might, maybe, possibly save the planet, if we are very, very lucky, and probably not?"