If someone cured cancer, do you think they couldn't be tried for murder?
If someone offered to cure cancer, but only if you permitted them to commit a single specific murder, is that a reasonable trade? All you've got there is yet another trolley problem.
If we make decisions based on what will have the best outcome, well the trolley problem is trivial; minimise the negative outcome.
In the scenario of murder for the cancer cure, you're still left with someone who was murdered. My take is that this isn't any less bad than someone who was murdered for something other than the cure for cancer, which in turn means I would stop this murder even if it meant not curing cancer.
You've lost me. Isn't that also the case in any trolley problem? The trolley is a sort of satirical analogy. The thing actually being considered is "I get this good thing but I'm also left with this bad thing as a direct result".
I guess a key difference is before versus after the fact. Agreeing to the outcome to "pay" for what you want is different than deliberating over an act committed by the same person after the fact in the absence of any prior agreement. But if the only issue is the lack of an agreement then it's less a matter of "murder non-fungible" and more a matter of enforcing legal procedure for the sake of social stability. The state needs to maintain its monopoly on violence I guess.
In the context of my comment the point is more about the distance between saying something rude and killing someone, it would be a large distance despite both being negative, and the tolerance levels would likely start somewhere in the negative side of the scale, though in reality you're going to be dealing with much more complex perceptions of good vs. bad behavior and social tolerance of it. But when you compare to the law that's going to have more of a concrete boundary. But it's still not 0 on this scale.