“Science” can tell us when life begins, provided that we already know what to look for. Empirical biology alone cannot tell us what that is. Once we establish a metaphysical account of life, then empirical embryology can tell us whether the relevant conditions are met.
If there is any plausible reason to believe that emergency contraceptives cause—even occasionally—the death of embryo, then they are morally equivalent to abortifacients.
From the beginning of its existence a human being is always already a person because personhood belongs to it essentially as an instance of that natural kind. The second of a two-part series.
Pro-choice philosophers err in their criticism of the pro-life position because they do not understand potentiality in terms of a being’s essential properties. The first of a two-part series.