You will never debunk someone who is convinced you are lying.
Oliver is an intelligent, bright, and thoughtful individual. Oliver is also a conspiracy theorist. He rejects the received narratives about, say, the assassination of John F. Kennedy, the Apollo moon landings, the 9/11 attacks, and the death of Osama bin Laden.
Reasoning with Oliver is difficult. If you present counter evidence to his beliefs, he immediately rejects the evidence because it fails to conform to his hypothesis of what ‘really’ happened. In fact, Oliver assumes that just about any attempt to change his mind is part of the conspiracy itself! Therefore, the more reputed and verified a piece of evidence is, the faster it is to be written off — “That’s exactly what they want you to believe!” he insists.