MENSA also defines genius by reference to IQ scores. As I hoped would be clear, I’m not referring to the sort of intelligence/genius that can be defined using IQ scores.
A genius is someone with exceptional intelligence. It’s true that I haven’t prescribed just how exceptional a person should be to count as a genius. Top 1%? Top 0.1? Hopefully, however, by the time you’ve finished reading, you’ll have a better idea of what I regard as genius-level thinking skills.