One has to acquire an “ability to see resemblances between apparently disparate problems.”34 Yes, textbooks present lots of facts and techniques. But they do not enable anyone to become a scientist. You are inducted not by the laws and the theories but by the problems at the ends of the chapters. You have to learn that a group of these problems, seemingly disparate, can be solved by using similar techniques. In solving those problems you grasp how to carry on using the “right” resemblances. “The student discovers a way to see his problem as like a problem he has already encountered. Once that
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