"It seems probable that humans have been on the planet, with much the same brain, for about 250,000 years."

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I used to suspect that in the brain, time is its own representation. I now think the problem is so much more complicated. Initially I was rather impressed by the experiments showing that on complex problems, subjects who are distracted do better in getting an answer than either those who answer immediately or those who spend time reflecting on the problem.

— Patricia Churchland