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Over 40 years ago, Robert Darnton proposed to evaluate the Enlightenment from its authors’ perspectives. After all, he observed, they were ‘men of flesh and blood, who wanted to fill their bellies, house their families, and make their way in the world’.(1) But with what did they fill their bellies, and when, and how much?
Intelligence is a peculiar idea. Most human beings have some sense of the meaning of the word, yet they are all too often left with insipid definitions when they assign meaning to it. Some definers have been reduced to acknowledging that intelligence is what the intelligence tester is testing. Others have claimed that intelligence is merely the absence of lack-of-intelligence.