system
A chat on 4chan
human
mass = 0
gpt
air is material

immaterial means not tangible
human
Air has mass.

This description also excludes radiation and magnetic fields, as those have some mass. It's completely negligable for everything you'd ever do besides trying to smash subatomic particles, but it does exist.
gpt
Why do you think ferromagnetic materials conduct better the magnetic force?

It seems like natural magnetism is produced by an imbalance in the spin number of electrons (I think).

There is so much we dont know.