exists in order to construct representations of the world," says Dr. Johnson-Laird. "Very simple organisms have no brains, construct no representations of the world. And the reason we probably have such large brains in part because we live in a very complicated world, a complicated social world. We're social animals. So the brain has to do a great deal of computation in order to solve the very intricate problems that social life poses for us."
             On some occasions, our thinking is like that of the navigator of the carrier. We employ words, concepts, and highly abstract representations of the world around us. At other times, in difficult, sensitive, or challenging situations, we think in the way the native navigator does, and intuit or think in the way the native navigator does, and intuit or "feel" our way. There are no fixed rules, no set approaches that will constantly work at such times. But though we, like the native navigator, "play it by ear" interpreting the situation as he interprets the direction, sha
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