Irrefragable

From Merriam Webster Dictionary

Definition of irrefragable

1 : impossible to refute - irrefragable arguments
2 : impossible to break or alter - irrefragable rules

Seen in Fahrenheit 451 updated: On the Amy Wax controversy surrounding the University of Pennsylvania Law School from The New Criterion.

What they found especially egregious was Wax and Alexander’s observation that “All cultures are not equal.” That hissing noise you hear is the sharp intake of breath at the utterance of such a sentiment. The tort was compounded by Wax’s later statements in an interview that “Everyone wants to go to countries ruled by white Europeans” because “Anglo-Protestant cultural norms are superior.”

Can you believe it? Professor Wax actually had the temerity to utter this plain, irrefragable, impolitic truth. Everyone knows this to be the case.