petitio principii[pi tis̸h′ē ō′ prin sip′ē ī′]
petitio principii definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Logic the fallacy of assuming in the premise of an argument the conclusion which is to be proved
Origin: Classical Latin a begging of the question
petitio principii definition by American Heritage Dictionary
The fallacy of assuming in the premise of an argument that which one wishes to prove in the conclusion; a begging of the question.
Origin: Medieval Latin petītiō prīncipiī : Latin petītiō, request + Latin prīncipiī, genitive of prīncipium, beginning.