Science fiction is that class of prose narrative treating of a situation that could not arise in the world we know, but which is hypothesized on the basis of some innovation in science or technology, or pseudo-science or pseudo-technology, whether human or extra-terrestrial in origin.
 A situation in which two moral principles conflict with one another. fictional or hypothetical dilemmas of this kind are often used to assess the moral beliefs or moral reasoning skills of individuals. Also called moral dilemma.
 Situations in which each possible course of action breaches some otherwise binding moral principle.
 lupus est homo homini.
 We live in a globalising world. That means that all of us, consciously or not, depend on each other. Whatever we do or refrain from doing affects the lives of people who live in places we’ll never visit. And whatever those distant people do or desist from doing has its impact on the conditions in which we, each one of us separately and together, conduct our lives.
Living in a globalising world means being aware of the pain, misery and suffering of countless people whom we will never meet in person.
 it is often claimed that, in those contributor’s dilemmas that involve very many people, what each person does would make no difference.
 Even if an act harms no one, this act may be wrong because it is one of a set of acts that together [sic] harm other people. Similarly, even if some act benefits no one, it can be what someone ought to do, because it is one of a set of acts that together benefit other people.
 it is often claimed that, in these cases, what each person does makes no diference.