JTR, this is an excellent post. In just one example of faulty reasoning, Saletan fails to adequately address the reduction in the gap between black and white IQ scores over time. Saletan makes the classic correlation equals causation mistake in arguing that while IQ gaps between blacks and whites have shrunk, they have not shrunk significantly in the last 20-30 years. Here, Saletan ignores a large number of other important factors from the last 20-30 years that could easily account for the lack of continued improvement in IQ scores.