CONFUTATION
confutation
(noun) evidence that refutes conclusively
confutation
(noun) the speech act of refuting conclusively
Source: WordNet® 3.1
Noun
confutation (countable and uncountable, plural confutations)
The act or process of confuting; refutation.
Source: Wiktionary
Con`fu*ta"tion, n. [L. confutatio: cf. F. confutation.]
Definition: The act or process of confuting; refutation. "For the
edification of some and the confutation of others." Bp. Horne.
Source: Webster’s Unabridged Dictionary 1913 Edition