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Problemsolving and the Penrose Triangle
There is no general method for solving problems. Surely are required wide general knowledge, deep special knowledge, experience, good association skills, intuition and endurance. Good luck is also useful. Problems that appear unsolvable at first sight can be suddenly solved by a new unconventional approach.
The Penrose triangle is an impossible three-dimensional object. However, the appearance in the figure above can be constructed as a real three-dimensional object. By considering the problem from a different perspective one arrives at a suprising solution.