Solving problems is a practical skill like, let us say, swimming. We acquire any practical skill by imitation and practice. Trying to swim, you imitate what other people do with their hands and feet to keep their heads above water, and, finally, youlearnto swimbypracticingswimming. Tryingto solve problems, you have to observe and to imitate what other people do when solving problems and, finally, youlearnto do problems bydoingthem.