As others- specifically Holly and Carrie- have said, high IQ is not the only indication of being a genius. First, there are many ways to define "genius", and many different ways to be one. For example, a mathematician specializing in physics could be a genius when it comes to mathematics, but be utterly clueless if you make them a military commander, because mathematical genius does not necessarily translate to tactical genius. The mathematician could also be socially awkward and lack knowledge in the area of psychology, or botany or economics. Conversely, someone could be completely inept at math, but have a fantastic understanding of psychology and "street smarts", and is able to read emotional/body "cues" that few people pick up on. As a famous saying attributed to Einstein goes, "everyone is a genius, but if you judge a fish by its ability to climb a tree, it will spend its whole life thinking it is stupid".