Definition of "petitio" []

• The logical fallacy of assuming the conclusion in the premises; begging the question (noun)

WordNet. Princeton University. 2010.

• "Second, because the idea of petitio principii is an interesting one and it is useful to have an English phrase for it."
• "The first is the fallacy of presumption, also know as petitio principii, which you impliedly assert is the only correct denotation."
• "To quote writers who inveigh against unjust taxation without first establishing whether Belloc's proposed taxation is unjust, is to be guilty of what in logic is called a petitio principii, that is, begging the question."