"Patterns are everything to us. We hunger for them. We revel in them. They are the basis for art, literature, music and much more in our lives. But a percepetual system that is so geared to wrestling patterns out of complex arrays of simuli is bound to produce some false positives. [...] Over time, natural selection probably favored perceptual systems and pattern detectors that were hyperactive enough to make their share of Type I errors [false positives]. In a perilous world, Type I errors tend to be less costly. And one of natural selections mottos has always been, "Better deluded than dead.""
~ Hank Davis in Caveman logic