You can actually take the high road on this later. If he ever tries to debate you again, just tell him you're not going to because he isn't willing to educate himself. The shame of that will make him defensive and just point back to this moment. You couldn't have made it easier for him to revise his beliefs, but he's either (a) too stubborn to change his opinion in the face of massive evidence opposing his viewpoint or (b) too lazy or foolish to comprehend. He won't want to be either option. Maybe it'll open him up down the road to actually learn.
Keep going back to this every time he wants to debate or argue about his positions until he agrees to read the HCQ site and admit he was wrong.
Arguing with fools is not about logic, you have to appeal to their pride.
You can actually take the high road on this later. If he ever tries to debate you again, just tell him you're not going to because he isn't willing to educate himself. The shame of that will make him defensive and just point back to this moment. You couldn't have made it easier for him to revise his beliefs, but he's either (a) too stubborn to change his opinion in the face of massive evidence opposing his viewpoint or (b) too lazy or foolish to comprehend. He won't want to be either option. Maybe it'll open him up down the road to actually learn.
Keep going back to this every time he wants to debate or argue about his positions until he agrees to read the HCQ site and admit he was wrong.
Arguing with fools is not about logic, you have to appeal to their pride.