 Parfit’s own concerns about proposal (a) are based on the apparent explanatory gap between the claim that the couple’s act makes things worse for “the child produced by the couple” and the result we seek to explain – that the act of entering into the contract is wrong. The question is whether there is anything we can grasp in what the couple has done to the child in fact produced that explains why the couple’s act is wrong. No “familiar moral principle” takes us from the shorthand claim to the assessment we are aiming to explain (Parfit 1987, 359; Wasserman 2008, 529–35; for discussion, see Weinberg 2008.)