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Intelligence is what you use when you do not know what to...
Quote by Jean Piaget about intelligence, use, contentment
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Knowing reality means constructing systems of...
Quote by Jean Piaget about reality
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To express the same idea in still another way, I think...
Quote by Jean Piaget about idea, knowledge, human imperfections
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Scientific knowledge is in perpetual evolution; it finds...
Quote by Jean Piaget about knowledge, evolution, day