Many of us were pleasantly surprised that our leading scientific societies have recently adopted such strong statements as to the reality and seriousness of anthropogenic climate change. There really is a scientific consensus, and it cannot be refuted or disproved by attacking any single data set.
I also think people need to come to understand that the scientific uncertainties work both ways. We don't understand cloud feedbacks. We don't understand air-sea interactions. We don't understand aerosol indirect effects. The list is long. Singer will say that uncertainties like these mean models lack veracity and can safely be ignored. What seems highly unlikely to me is that each of these uncertainties is going to make the climate system more robust against change. It is just as likely a priori that a poorly understood bit of physics might be a positive as a negative feedback.
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