http://davidbrin.blogspot.com/2010/02/distinguishing-climate-deniers-from.html
It is nice to be able to distinguish between the healthy scepticism of Mr David Brin and the un-healthy denialism of people like Alan Jones, Lord Monckton, Barnaby Joyce and (unfortunately) George Cardinal Pell. (Note: these are all old men who are not scientists.)
Thanks Mr Brin for the education!