> Yes, I know he didn't invent this particular fold

So how could he patent it?

I join the parent: it's a kid who empirically evaluated how much weight an existing fold can hold. It's not like he solved a hundred years old mathematical problem.

That evaluation has value and the possible use case of strong and cheap emergency housing is interesting though it sounds like it would take substantial work to push it to fruition and would need to be competitive with existing solutions.