Question

those seeking to explore the unknown need not travel to distant galaxies; rather, they need only look inward, because one of the last great frontiers exists within us. the human brain, with 80 to 100 billion neurons, is the most complex biological structure in the universe—and remains largely uncharted by science. furthermore, each year, new mysteries emerge that challenge what we think are fundamental truths about the brain. consider, for example, the common belief that brain size is linked with intelligence. science has revealed that there’s little truth to that belief. in fact, research on patients with hydrocephalus, a condition in which there’s too much fluid in the skull, has revealed that individuals with almost no brain matter can function without any impairment. for instance, researcher john lorber described the case of a man with only a single centimeter of brain tissue between his brain’s center and its surface. typical human brains have about 4.5 centimeters of tissue. despite his unusual brain, this remarkable man ____. investigations of other individuals with little brain matter have revealed similar cases, driving home just how little we know about the organ that allows us to know anything at all. fill in the blank with the most logical inference.

Explanation:

The passage discusses the complexity of the human brain and challenges the common - belief about brain size and intelligence. It gives examples of individuals with little brain matter functioning well. So, the blank should be filled with something that continues this idea of a person with an unusual brain functioning normally.

Answer:

had an IQ of 126 and was a mathematics graduate student (or other reasonable examples showing normal or high - level functioning despite the unusual brain)