It's called the argumentative theory of reasoning, and it says that humans didn't learn to ask questions and offer answers in order to find universal truths. We did it as a way to gain authority over others. That's right -- they think that reason itself evolved to help us bully people into getting what we want. Here's how a proponent puts it:
"'Reasoning doesn't have this function of helping us to get better beliefs and make better decisions,' said Hugo Mercier, who is a co-author of the journal article, with Dan Sperber. 'It was a purely social phenomenon. It evolved to help us convince others and to be careful when others try to convince us.' Truth and accuracy were beside the point."
And as evidence, the researchers point out that after thousands of years of humans sitting around campfires and arguing about issues, these glaring flaws in our logic still exist. Why hasn't evolution weeded them out? The answer, they say, is that these cognitive flaws are adaptations to a system that's working perfectly fine, thank you. Our evolutionary compulsion is to triumph, even if it means being totally, illogically, proudly wrong.
You do this, too. If you're a human being, you're from a long line of people who got to the winner's circle again and again by ignoring facts in favor of advancing your side. So, the next time you find yourself desperately Googling for some factual example that proves your argument is right, and failing to find even one, stop. See if you can put the brakes on and actually say, out loud, "Wait a second. If the things I'm saying in order to bolster my argument are consistently wrong, then maybe my argument is also wrong."
It's going to be harder than you think. Back when evolution was still sculpting your ancestor's brains, admitting you were wrong to the person you were debating got you bred out of existence. These days, being able to admit you're wrong is the greatest skill you can develop if you want to stay married.
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