Height and eye color are measurable and meaningful. Intelligence is neither.
It astonishes me that people can claim with a straight face that it is not. I suspect it is sour grapes or something?
If intelligence isn't measurable, then you would agree that the average frog cannot be reliably distinguished from the average human in terms of intelligence?
Ok, so lets move on from that, and don't give me some painful story about how there are different kinds of intelligence and frogs are 'smarter about eating bugs' or something, please?
Maybe with the benefit of the doubt, you are trying to say that human's are genetically not very diverse, and so you can't find significant differences in intelligence. To that I would say you are certainly not claiming this in good faith, and you have some quasi-political reason to deny something that is obviously true to anyone who has interacted with more than 3 people. (and we can skip the lecture along the lines of 'you can't trust what is obvious and have to pretend that all your beliefs are properly cited or they are invalid')
Do you not agree that different people have different talents? Some are good at constructing clever arguments, some can compose beautiful music, and some can solve partial differential equations in their heads.
the IQ simply doesnt measure creative genius. if it was called "the test that measures how good a persons brain is at pattern recogniton", you wouldnt care. you'd simply state that you're not particularly interested in logical reasoning.
intelligence, in terms of IQ, is a more or less well defined metric. in popular language, its conflated with "not being a mouthbreather". thats why people get pissy when they dont score above average on an iq test. its kinda pointless, really. people only care about iq tests because of the name.
Intelligence is an ill-defined, nebulous quantity. IQ is a precisely defined quantity. Since intelligence is hard to measure and IQ is easy to measure, it's tempting to use one as a proxy for the other. But I, and the other posters above me, just don't find that very convincing.
You can define genius as a mark on the IQ scale, but that certainly isn't the definition being used when people use the word in conversation. That conversational form of genius is the social construct.
Despite the difficulties involves in measuring it exactly, intelligence does exist objectively and is measurable in principle: https://en.m.wikipedia.org/wiki/G_factor_(psychometrics)