A baby in the crib just looks like a soft, downy, innocent creature without an agenda. Actually, it has the greatest mind in the universe in the process of solving major philosophical questions with a brain that is smarter, faster, and busier than any adult's, maintain three developmental scientists whose insights from the combined fields of psychology and neurology have generated a quantum leap in understanding how a child's mind grows. Alison Gopnik, a cognitive psychologist at the University of California, Berkeley, and Andrew Meltzoff, a pioneer in infant psychology, and Patricia K. Kuhl, an authority on language development, both from the University of Washington, Seattle, are …