S: It would be premature to act to halt the threatened "global warming trend, " since that alleged trend might not be real. After all, scientists disagree about it, some predicting over twice as much warming as others, so clearly their predictions cannot be based on firm evidence. W: Most scientists consider discussions of accepted ideas boring, and prefer to argue about what is not known. According to the International Science Council, there is a consensus among reputable investigators that average global warming in the next century will be from 1. 5 degree to 4. 5 degree C. W's rejoinder proceeds by ['putting disagreements cited by S in perspective by emphasizing similarities', 'reasoning in a circle by accepting evidence only if it agrees with a desired conclusion', "accepting S's conclusion while disputing the reasons offered for it", 'relying on authorities whose views conflict with the views of the authorities cited by S']