"Climate change has become what philosophers call a “non-falsifiable hypothesis.” Everything—Hurricane Sandy, warm winters, cold winters—is said to be proof of climate change.
"Try this parlor game out at a cocktail party next time you’re clinking ice-free glasses with a warmist: ask him to specify what climate or weather phenomenon would not be consistent with the general theory of climate change. And then step back and enjoy the fun." - Steven Hayward at Powerline blog. (more . . }