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In 1940 R. G. Collingwood published "An Essay on Metaphysics" in which he examined presuppositions in statements and questions. In fact he claimed "Every statement that anybody ever makes is made in the answer to a question." By way of explanation, he wrote "In proportion as a man is thinking scientifically when he makes a statement, he knows the statement is the answer to a question and he knows what the question is." In this sense, when thinking is scientifically ordered, a question is logically prior to its own answer. Collingwood also asserts that "Each question involves a presupposition".