Something like "sets that aren't even hypercomputable aren't real". Inventing proper classes, which are like sets but randomly can't go in other things, is a pretty lame solution, anyway. Although, it can probably emulate the former approach, and it's easy to describe.

Source: I have some flab some places.

To rely on people more competent than me on such matters of importance.

mathematical expressions are evaluated on a computer hardware (the brain), that in "normal" cases eventually converges on a result. but sometimes it starts oscillating instead.