Re: Can this inform the 5G debate?
If I knew someone like that I would give him hundreds of things to worry about.
Anything to stop them annoying me.
The flocks of killer penguins slowly working their way north (show clip of BBC documentry with flying ones).
Ask him if he was a trichromate, wait.
When he comes back ask him what colour a tretrachromate sees which a trichromate doesn't. (Mess up their mind).
Our current work windup is getting a bitcoin miner to compare his electric bill to his winnings, and he still thinks he makes a profit despite a £100 a month electric bill and £20 to £30 winnings.