re·but 
/riˈbʌt/ verb
re·buts; re·but·ted; re·but·ting /riˈbʌt/ verb [+ obj] formal : to prove (something) is false by using arguments or evidence
▪ Her lawyer attempted to rebut the witness's testimony.
▪ Her lawyer attempted to rebut the witness's testimony.
— re·but·tal /rɪˈbʌtl̟/ noun, plural re·but·tals formal
[count] ▪ Her report is a rebuttal of some common misconceptions. ▪ In an angry rebuttal, the researchers claimed they were being unfairly scrutinized. [noncount] ▪ He said in rebuttal that he hadn't cheated.
/rɪˈbʌtl̟/ noun, plural re·but·tals formal [count] ▪ Her report is a rebuttal of some common misconceptions. ▪ In an angry rebuttal, the researchers claimed they were being unfairly scrutinized. [noncount] ▪ He said in rebuttal that he hadn't cheated.
