moral reflection emerges naturally from an encounter with a hard moral question. We start with an opinion, or a conviction, about the right thing to do: “Turn the trolley onto the side track.” Then we reflect on the reason for our conviction, and seek out the principle on which it is based: “Better to sacrifice one life to avoid the death of many.” Then, confronted with a situation that confounds the principle, we are pitched into confusion: “I thought it was always right to save as many lives as possible,
