It is a type of indirect proof: more specifically, a proof by contradiction.
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A statement that can be proved to be true or false is known as a proposition in logic. For example, the statement "The Earth orbits the Sun" is a proposition that can be verified as true. Conversely, the statement "All swans are white" can be proven false by the existence of black swans. These statements are distinct from opinions or questions, which cannot be categorized as true or false.
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False. (apex)
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