Science deals mostly in probabilities, not certainties. But a wise man plays the odds. What astonishes me about “deniers” is their willingness to stake the future of the planet on a long shot, and act on blind faith to do it. They are so certain that they can infallibly predict the future that are willing to literally risk the future of the planet rather than admit the possibility that might be wrong and take precautions accordingly: precautions not based on the assumption that AGW IS a problem, but based on the acknowledgement that it MIGHT be a problem. What other threat would they simply ignore? I lock my door at night (and perhaps take other precautions) not because I expect someone to try invade my home, but because I know it is possible, though I have never been the victim of crime. I haven’t had an auto accident in years, but I wear a seat belt. The TSA has not, as far as I know, stopped a single terrorist plot against an airplane: should we drop all those airport security checks? Just because you don’t want to be a Chicken Little does not mean you have to be a Pollyanna. One is as bad as the other, and a person with a little wisdom, a little skepticism, will neither panic over a threat nor ignore it. Not to mention the simple fact that most all the things the “Chicken Littles” want us to do, increase efficiency and move from finite and dirty to infinite and cleaner sources of energy, are all things that will be good for the economy and the planet in the long run, even if AGW is a mistake.