invalidate
v[Tn]
make (sth) invalid 使(某事物)无效或作废
faulty logic which invalidated her argument 造成她的论据不能成立的错误逻辑. invalidation n [U]
(action of) making sth invalid 无效; 作废
The making of false statements could result in the invalidation of the contract. 提供虚假资料可能导致合同失效.
I suggest that we ask users of this machine what they think about it. We can photograph them using it too. Then we can put their comments at the top of the advertisement in big print. We can bring in some humour too. People enjoy reading humorous ads.