"refutation" in the noun sense
1. refutation, defense, defence
the speech act of answering an attack on your assertions
"his refutation of the charges was short and persuasive"
"in defense he said the other man started it"
2. disproof, falsification, refutation
any evidence that helps to establish the falsity of something
3. falsification, falsifying, disproof, refutation, refutal
the act of determining that something is false
Source: WordNet® (An amazing lexical database of English)
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