It is remarkable that any one could read my commentary "Does Gender Matter?" and conclude that I said that there are not innate differences between male and female brains. Nothing could be further from the truth. The point of my commentary was to say that there is no convincing evidence that these innate differences are relevant to women's ability to advance in science. Rather the weight of the evidence is that prejudice and bias are responsible for the great majority, if not all, of the problem.