arguendo

Etymology
From.

Adverb

 * 1)  for the sake of argument; assuming without deciding; identifying the premises of a hypothetical argument while making it clear that no finding is being made on whether the premises are true.
 * 2) * 1978, Matter of Green, 586 F. 2d 1247 - U.S. Court of Appeals, 8th Circuit
 * Assuming arguendo that those assertions are factually true, we find respondent's claim to be without legal merit.

Usage notes

 * Used after the word it modifies, due to the influence of Latin grammar: assuming arguendo not *arguendo assuming.