Wiktionary
disconfirm
vb. (context transitive English) To establish the falsity of a claim or belief; to show or to tend to show that a theory or hypothesis is not valid.
Usage examples of "disconfirm".
In the spirit of garage dragons, it is much better, for those claims not already disproved or adequately explained, to contain our impatience, to nurture a tolerance for ambiguity, and to await - or, much better, to seek - supporting or disconfirming evidence.