This article focuses on cognitive process that distort our reasoning and call into question the idea that people, and by extension, political actors and decision makers are “Rational Actors”. Among several sources of flawed reasoning, it examines the idea of ‘confirmation bias’, the tendency for people to dismiss or ignore information that conflicts with preexisting ideas and beliefs while accepting new information that is consistent with old -regardless of the evidence.

  • “Even after the evidence “for their beliefs has been totally refuted, people fail to make appropriate revisions in those beliefs,” the researchers noted. In this case, the failure was “particularly impressive,” since two data points would never have been enough information to generalize from.”

The refer to a book that argues that this is a social phenomena. It is not adaptive for individuals:

  • “If reason is designed to generate sound judgments, then it’s hard to conceive of a more serious design flaw than confirmation bias. Imagine, Mercier and Sperber suggest, a mouse that thinks the way we do. Such a mouse, “bent on confirming its belief that there are no cats around,” would soon be dinner. To the extent that confirmation bias leads people to dismiss evidence of new or underappreciated threats—the human equivalent of the cat around the corner—it’s a trait that should have been selected against. The fact that both we and it survive, Mercier and Sperber argue, proves that it must have some adaptive function, and that function, they maintain, is related to our “hypersociability.””

We tend to accept and internalize ideas that come from within our group and remain skeptical about those that come from others:

  • “Mercier and Sperber prefer the term “myside bias.” Humans, they point out, aren’t randomly credulous. Presented with someone else’s argument, we’re quite adept at spotting the weaknesses. Almost invariably, the positions we’re blind about are our own.”