"Many behaviors with no obvious cultural component were supposed to be [universal]. Take the optical illusion in which a line segment, A, has an--outward--pointing arrow on each end, and an identical segment, B, has an inward--pointing arrow on each. To most American undergrads, B looks longer by some 20 percent. This has been cast as a general property of human vision. But to the San of the Kalahari, African hunter-gatherers, the lines look (correctly) the same length. The illusion arises when kids grow up in an environment filled with right angles. It is not “human,” but specific to WEIRD cultures." - Simon

The great thing about undergrads is that they're an inexhaustable resource. - Gabe