The phrase "irrefutable truth" means a fact or statement that is impossible to prove wrong or deny. It is something that is unquestionably true and cannot be argued against. Full definition
What could and should be an open and informed discussion about the kind of society we wish to live in is obscured by weapons of mass distraction - a series of accounting exercises, using figures as weapons dressed up as irrefutable truths. (politics.co.uk)
Only in the face of irrefutable truth do we admit the error, and even then only some people will do this. (iwillteachyoutoberich.com)
> Does this not remain to be the irrefutable truth, that GOD will be the JUDGE of your actions here on earth? (religion.blogs.cnn.com)