 (ii) It tends to be easier to avoid killing than to avoid letting die, but this is only a tendency. Sometimes saving is easier than not killing. It is easy to throw a life preserver, and it may be difficult to refrain from killing someone who is threatening one or who has treated one appallingly. There are even cases where it is physically difficult to avoid killing; as for example, where one has to hold tight to a tree to prevent one’s (light) vehicle whose brakes have failed from running into a pedestrian.