It seems reasonable to believe that there is some level of innate intelligence, and some level of “functional intelligence” (I’m making up the term). Functional intelligence being the level of mental work you could do at any particular moment, which would be some function of your innate intelligence, and a series of environmental factors, some long term such as how you were raised and what kind of education you received, and some short term like how tired or hungry you are at the moment. It seems reasonable to believe that an IQ test would be a good indication of your functional intelligence at the time but not innate intelligence. Which would make it somewhat correlated to innate intelligence but not extremely well correlated. It seems reasonable to believe this level of innate intelligence is genetically determined. As far as I know no one has been able to dispute the idea of some innate intelligence.