Professors who lack any understanding of how a brain could produce intelligence like to use localization claims to try to impress us. When a localization claim occurs, a professor will try to impress us with his understanding by claiming that some particular mental function comes from some particular part of a brain. After hearing such claims, someone might say, "These guys may not the how of cognition, but at least they know the where." But such localization claims do not hold up well to scrutiny.
One of the main localization claims that has long been made by neuroscientists is a claim that thought or decision making come from the front top part of the brain, the prefrontal cortex. In my post here I cite many neuroscience papers giving evidence that conflicts with such a claim. For example, the scientific paper here tells us that patients with prefrontal damage "often have a remarkable absence of intellectual impairment, as measured by conventional IQ tests." The paper here tested IQ for 156 Vietnam veterans who had undergone frontal lobe brain injury during combat. If you do the math using Figure 5 in this paper, you get an average IQ of 98, only two points lower than average. You could plausibly explain that 2 point difference purely by assuming that those who got injured had a very slightly lower average intelligence (a plausible assumption given that smarter people would be more likely to have smart behavior reducing their chance of injury). Similarly, this study checked the IQ of 7 patients with prefrontal cortex damage, and found that they had an average IQ of 101.
Claims that thought comes from the prefrontal cortex have always been inconsistent with the observational reality that certain birds behave with a rather keen intelligence, despite a lack of any cerebral cortex. An article on Aeon mentions how there is little correlation between brain size and intelligence, or a correlation between intelligence and the size of a frontal cortex. The article states the following: