in·con·tro·vert·i·ble 
(ĭn-kŏn′trə-vûrtə-bəl, ĭn′kŏn-)
(ĭn-kŏn′trə-vûrtə-bəl, ĭn′kŏn-)adj.
Impossible to dispute; unquestionable: incontrovertible proof of the defendant's innocence.
in·con′tro·vert′i·bili·ty, in·con′tro·verti·ble·ness n.
in·con′tro·verti·bly adv.