The ultimate philosophy thought experiment:
You are locked in a cave since birth, in the cave a trolley is heading towadr a person chained to the rails, if you do nothing the person will die but the door of the cave will open and you’ll be able to live, if you use the lever the person won’t die but every cells in his body will be replaced 1 by 1 by an exact copy until the person maybe become a different person or maybe not.