Perhaps every single one of us is stupid, just not completely. Clearly there are variations in what we can call “personal style,” but nobody is so smart that they are not also frequently stupid, and vice versa. The same person can design an award-winning public building and still be defeated by a parking meter with perfectly clear instructions on the side. A hobby chess player can visualize a tree of possible moves five or six deep, but cannot anticipate running out of toilet paper until the moment he does.

Perhaps every single one of us is stupid, just not completely. Clearly there are variations in what we can call “personal style,” but nobody is so smart that they are not also frequently stupid, and vice versa.

The same person can design an award-winning public building and still be defeated by a parking meter with perfectly clear instructions on the side. A hobby chess player can visualize a tree of possible moves five or six deep, but cannot anticipate running out of toilet paper until the moment he does.