particularly people from very different cultures, people who think that bushmen in africa would show this illusion. do you think little children would show similar illusion? >> great questions, and the data are not in, and i'll follow the data. i have no reason to think that they wouldn't. i mean, i certainly have no reason to think that bushmen in africa live more inside their own individual mans than anybody else, right? i assume they're also collaborators and team players, and that i think is the first of the illusions. so, my prediction would be they would indeed show the illusion. kids, too. it's harder to show with those populations populations and that is important work to be done. >> i would like to ask you about reasoning and the difference between individual and group reasoning. a recent theory of reasoning suggests that reason is something that develops evolutionary as a social evidence of civil activity and the point is to argue -- rather than find the truth individualry. one of the predictions of the theory is that group or -- reasoning should be somehow more powerful or