Ask joe if maths matter?
Are they wearing a mask to blend in, or are they wearing a mask because they think the air is full of pathogenic poison, or do they only think the air is poisonous because they have been lied to and haven’t figured out yet that government, academia and media lies 24/7?
Can they identify hypocrisy?
Do they understand irony?
Are they interested in logic?
These might be a starting point.
If you figure it out, please come back here and share.