petitio principii

 
Pronunciation: /pɪˌtɪʃɪəʊ prɪnˈsɪpɪʌɪ, prɪŋˈkɪp-/

noun

Logic
  • a fallacy in which a conclusion is taken for granted in the premises; begging the question.

Origin:

Latin, literally 'laying claim to a principle'