Last week, I linked to a short description of the SLED Test – a powerful tool for helping people see that the differences between the newborn and the unborn are not significant in the way that abortion advocates need them to be. Discussion of the SLED criteria has been raging in the comments section of that post. (Frank Beckwith even weighed in with some sneak previews of his upcoming book, Defending Life: A Moral and Legal Case Against Abortion Choice, due out from Cambridge University Press next year. Highly recommended.)
There’s a more nuanced abortion-choice argument using the SLED criteria. It claims that it's not each of these differences alone that disqualifies the unborn. Instead, the argument says, it is all of those differences together that show that the unborn lacks the right to life.
How can we respond? In my short response, I borrow an illustration I heard once from J.P. Moreland. It's as simple as four leaky buckets.