Dear Dr. Dawkins: Earlier this week, on Twitter, you drew attention to a troubling fact, that in the United States and Europe, most children conceived with Down syndrome are aborted. You made your point about the ubiquity of Down syndrome abortion in order to defend a terrible assertion. You suggested a moral imperative to abort children conceived with Down Syndrome. You said that if a woman had the choice to abort such a child, and she failed to so, she would have acted immorally. I’m troubled and confused by that.