Definition of petitio principii in English:

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petitio principii

Pronunciation: /pɪˌtɪʃɪəʊ prɪnˈsɪpɪʌɪ/
Pronunciation: /prɪŋˈkɪp-/

noun

Logic
A fallacy in which a conclusion is taken for granted in the premises; begging the question.
Example sentences
  • This, with great respect, is a petitio principii - reasoning which assumes the very thing which requires decision.
  • Here I shall simply observe that the objection is a gross petitio principii.

Origin

Latin, literally 'laying claim to a principle'.

For editors and proofreaders

Line breaks: pe¦ti|tio prin|cipii

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