Ideally the person who claims something needs to provide the data to back it up.
My father-in-law doesn't believe that the moon landings took place. All the data in the world cannot convince him otherwise. The only good strategy in the face of these types of claims is to go up the crazy scale. For example when he tells me that the moon landings didn't happen, I tell him he's naive it he thinks the moon exists. The moon was blown up in the 50's due to a nuclear test gone wrong and what we're seeing now is an artificial projection.
My father-in-law doesn't believe that the moon landings took place. All the data in the world cannot convince him otherwise. The only good strategy in the face of these types of claims is to go up the crazy scale. For example when he tells me that the moon landings didn't happen, I tell him he's naive it he thinks the moon exists. The moon was blown up in the 50's due to a nuclear test gone wrong and what we're seeing now is an artificial projection.