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English definition of “presupposition”

presupposition

noun [C or U]     /ˌpriː.sʌp.əˈzɪʃ.ən/
something that you believe is true without having any proof: Your actions are based on some false presuppositions. This is all presupposition - we must wait until we have some hard evidence.Guesses and assumptionsIdeas, concepts and theories
(Definition of presupposition noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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