This was quite easy for me. The principles: 1. Only pull the lever if you are sure. With an action you assume responsibility for the outcome. 2. Don't believe everything what you see or are told. If you doubt do nothing. Imagine you killed many people because you have been lied to and pulled the lever. In this case it is better you did nothing. 3. An action of yours might kill someone. This is a very heavy responsibi…
I expect these people to act this way routinely, give hazard pay to their entire profession to compensate for the risk, but likewise consider it my obligation to act likewise when the situation is clear (like in the Trolley Problem).