Of course, most of us won’t ever be in a situation where we’re sterilized or given a lethal injection because of our IQ scores. But looking at these extremes allows us to ask some important questions, namely, What are these numbers? and, What do they truly say about our intelligence? The answer is that the numbers largely indicate a person’s ability to perform on a test of certain sorts of mathematical and verbal reasoning. In other words, they measure some types of intelligence, not the whole of intelligence.
