[fsflover]

> The fact that you spent any time typing a comment on this site is wildly irrational.

I find making such comments very rational: They convince random observers not to support wars and child labor without any reason apart from following blind marketing.

> If you really believe that humans can or do operate "rationally" about any significant part of their lives

People can and do operate rationally from time to time: It's our main difference from the animals.

> Your definition of "rational" and the assumption that it could be universal is itself irrational.

If your definition of "rational" is supporting wars and child labor, then I indeed agree with you that you are irrational.