Some of the comments here remind me of Malcolm Galdwell's spaghetti sauce talk or similar about how the air force discovered you can't average pilot characteris

Some of the comments here remind me of Malcolm Galdwell's spaghetti sauce talk or similar about how the air force discovered you can't average pilot characteristics to develop a cockpit. Both are examples where you can't use a single metric for something that varies on multiple independent axes. That's what IQ is trying to do. It doesn't work. You can develop different IQ systems for IQs on different axes (logic, memory, visual acuity, etc. etc. etc.) but trying to have a single number that represents all of them will never work.