adverb.
In an incontrovertible manner; in a manner not capable of being denied, challenged, or disputed.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adverb.
in an obvious and provable manner
Word Usage
"In fact, I learned from Bear Grylls (I assume that television shows remain incontrovertibly educational?) that we can survive in the harshest environments for so long as we have a canteen, shoelaces, socks and a camera crew."