I asked him “what color were the clouds back then?” and he said they were white. I asked him what happens if I take an orange light and light up something that’s white with it. He ignored me. He went on about how everyone in his age group remembers the Sun being orange, and by me questioning him, I’m calling him and all his peers liars and I’m stupid because I’m younger than him and vaccinated.
I’m going to take a different stance to a lot of the posters here.
Your friend may be showing signs of undiagnosed mental illness.
If you value him, listen to him and confront him when he has broken away from reality. But don’t argue with him. Be firm in your disagreements but don’t argue.
Be supportive of him if you can. Make sure he has a support network (parents siblings others)
Sometimes mental illness does not manifest until early adulthood.
Know your limits. Care for yourself.
Seconded. The friend is likely going through a mental illness.