petitio principii
noun
pe·ti·tio prin·ci·pii pə-ˈtē-tē-ˌō-(ˌ)priŋ-ˈki-pē-ˌē 
: a logical fallacy in which a premise is assumed to be true without warrant or in which what is to be proved is implicitly taken for granted
Example Sentences
Recent Examples on the Web In the Middle Ages, Aristotle’s phrasing was translated into Latin as petitio principii. 
Melissa Mohr, The Christian Science Monitor, 16 May 2022
Melissa Mohr, The Christian Science Monitor, 16 May 2022 Word History
Etymology
Medieval Latin, literally, postulation of the beginning, begging the question
First Known Use
circa 1531, in the meaning defined above
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