Verb
give the lie to (third-person singular simple present gives the lie to, present participle giving the lie to, simple past gave the lie to, past participle given the lie to)
(idiomatic, transitive) To reveal or prove (something) to be false; to refute.
They found plenty of emails that gave the lie to his assertion that he didn't know about the incident.
Men of the eleventh! the enemy say we are good at a long shot, but cannot stand the cold iron. I call on you to give the lie to that slander. Charge! Winfield Scott
Should I perchance still feel after my death, I would no longer have any doubt, but I would most certainly give the lie to anyone asserting before me that I was dead. Giacomo Casanova