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 noticed I kept switching between several principles. Possibly triggered by the details of the problem. Some of the principles: 1. If you're able to act, you are already responsible for the outcome. Inaction is a choice too. There's no intrinsic moral difference between pulling the lever or not. 2. Acting from a position of ignorance is irresponsible. Better not to act than to take the risk of making the situation w…
There’s no real-world case where that person is not considered responsible.
Not to mention that trains really cannot go over switches at speed. A runaway trolley would probably derail at the switch if it was set on the side track.