I was having lunch yesterday in the university cafeteria with a priest who teaches a course on ethics. Predictably, the priest was doing what we all do, namely, complaining about his students–complaining, in particular, about their susceptibility to pro-choice propaganda. “You know,” he said in dismay, “I asked them when human life begins, and they all think it begins when the child exits the womb!” Not everybody at the table knew quite how to respond to this, but I told the priest I sympathized with his dismay. Obviously, I said, human life doesn’t begin when the child exits the womb. It begins when the child exits the house.
I somehow feel like I learned this lesson from Judith Jarvis Thomson, but I’m probably misremembering her argument.