Person A: I believe that abortion should be banned unless there is a risk to the mother's life. You never know in advance if abortion will kill the mother's life, but if the abortion is a risk to the mother's life, then she should be allowed to get an abortion. This includes all pregnancies at all stages of development, because all pregnancies are a risk to the mother's life (even if it's (1/a trillion) percent chance). Abortion legalization should therefore be unrestricted.
How could a pro lifer disagree with that logic? Unless they maybe state, "The odds of a woman dying from this pregnancy has to be at least X% in order to allow her to get an abortion."
How much would X be? Because I can argue that if X% is .0000000001%, then I can advocate banning abortion unless a risk to the mother's life and it sounds very pro choice. Even repealing the Hyde Amendment sounds pro life if X is this low if it's the mother's life we are talking about.
What is your value of X is you are pro life?