Obfuscation. Theft, assault, rape, and murder are internally inconsistent. It's really that simple!
The trolley problem is a bullshit trap. The person who COULD intervene did nothing to set up the scenario (and the scenario never occurs anyways). The person responsible is the person who ties people to the tracks and sends a trolley after them. Nobody else. Same as if person A points a gun at person B, what person B does is the responsibility of person A.
RE: Principles and Predictions