The trolley's current path, which it itself cannot deviate from (assume its "brakes" aren't working), will lead it to kill four workers tied to the ground. You, however, see a lever that will change the trolley's path to one that will lead to the killing of one worker tied to the ground (instead of four). Do you push the lever, saving the four and killing the one? Or do you not do anything and watch the train continue on its path, killing the four? What is the most ethical choice