Relativism about truth is a self-refuting claim — the claim that there is no objective truth is itself an objective truth claim

Mike argues that 'there is no objective truth' is demonstrably self-refuting: if it is true, then objective truth exists. He recommends asking the friend 'how did you come to know that to be true?' as a Socratic mirror technique. He notes this is easy to demonstrate logically but difficult to change someone's mind about emotionally.