Adjective : absolute and incontrovertible truth.    From Dictionary.com. 

If the paradigm of the sciences (which themselves, as he observes in passing, carry an imprimatur of epistemic prestige and the image of incontrovertibility) is Newtonian mechanics, and we then implant that model under our subsequent thinking about psychology, we will almost immediately arrive at an idea of a science of the mind, where that science would progress through the gradual accumulation of psychological laws.    From Wordnik.com.  [Wittgenstein's Aesthetics] Reference

There is an insistence on the incontrovertibility of individual perception, which is coupled with an extraordinary sensitivity to the world, especially its sounds and colours.    From Wordnik.com. Reference

This can mean that what constitutes 'knowledge', despite the concept involving incontrovertibility, is in fact contested around the world, between religions, amongst historians, scientists etc.    From Wordnik.com.  [Conservapedia - Recent changes [en]] Reference

But the Post's chosen narrative -- the one promoting the win/lose dichotomy -- sees the CRU as trying to root out the hostile opponents of settled fact, not individuals posing legitimate arguments against the incontrovertibility of anthropogenic global warming.    From Wordnik.com.  [NewsBusters.org - Exposing Liberal Media Bias] Reference

"A device perhaps from the incontrovertibility of the one to win credence for the other.    From Wordnik.com.  [The Guardian World News] Reference