I'm not making the strongest claim about obesity, I'm making the weakest. That is, my claim is merely that some people choose to be fat, not that all people do.

I'm not making the strongest claim about obesity, I'm making the weakest. That is, my claim is merely that some people choose to be fat, not that all people do. It seems altogether unreasonable to suggest that there are no fat people on Earth who choose to be that way. And, as I noted above, the people who talk to me don't generally discuss a lack of willpower. They discuss their willingness to eat things they know are bad and their unwillingness to be active. It's possible that this is all part of the hocus-pocus of cognitive science and that they're merely verbalizing a chemical predisposition, but I'm not quite so cynical about human consciousness to believe that.