- A runaway trolley will kill five people. Switching it onto a side track will kill one. Assume these outcomes are certain and there is no third option.
- [Q @decision] Should we switch the trolley?
  - [C answers @decision] We should switch it.
    - [_ +> ^; @fewer-deaths]
      - [.] Switching kills fewer people than doing nothing.
      - [.] When all other morally relevant considerations are equal, we should choose the action that kills fewer people.
    - [O -> @fewer-deaths] Are the other considerations equal? Switching redirects a threat onto someone who would otherwise be safe.
- The objection asks whether the reason is enough. It leaves the arithmetic intact.