It looks as if the offspring have eyes so that they can see well (bad, teleological, backward causation), but that's an illusion. The offspring have eyes because their parents' eyes did see well (good, ordinary, forward causation).
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About Steven Pinker
Steven Pinker was a contemporary American american psycholinguist. Steven Arthur Pinker is a Canadian cognitive psychologist, psycholinguist, popular science author, and public intellectual. He is an advocate of evolutionary psychology and the computational theory of mind. Read more on Wikipedia →