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Examples involving love and human intelligence are not entirely successful. It is impossible to answer the question of whether they can be touched, as there is no precise definition of what "love" and "human intelligence" are, as these are rather subjective concepts. It is quite possible that love and human intelligence are just a piece of paper lying on your desk among scattered documents. However, let's move on to our triangles. I hope no one will argue that the MODEL of this geometric figure can be touched. Therefore, the question should be asked differently: is the model of a triangle a triangle? If so, then the triangle can be touched.