[waxman]

You're incorrectly using the term "ad hominem." An ad hominem argument is when you try to invalidate an idea with an irrelevant personal attack. The problematic incentives facing climate change scientists are certainly relevant to their research. I'm not saying we should dismiss their data necessarily, but I am calling into question their motivations. Would we be skeptical of public health research on smoking funded by a tobacco company? I hope so. But just because they would have strong incentives to produce a particular outcome doesn't mean their science is wrong, but it could very well be biased. Same here.