EDIT: Mestroyer was the first one to find a bug that breaks this idea. Only took a couple of hours, that's ethics for you. :)
In the last Stupid Questions Thread, solipsist asked
Making a person and unmaking a person seem like utilitarian inverses, yet I don't think contraception is tantamount to murder. Why isn't making a person as good as killing a person is bad?
People raised valid points, such as ones about murder having generally bad effects on society, but most people probably have the intuition that murdering someone is bad even if the victim was a hermit whose death was never found out by anyone. It just occurred to me that the way to formalize this intuition would also solve more general problems with the way that the utility functions in utilitarianism (which I'll shorten to UFU from now on) behave.
Consider these commonly held intuitions:
- If a person is painlessly murdered and a new (equally happy) person is instantly created in their place, this is worse than if there was a single person who lived for the whole time.
- If a living person X is painlessly murdered at time T, then this is worse than if the X's parents had simply chosen not to have a child at time T-20, even though both acts would have resulted in X not existing at time T+1.
- If someone is physically dead, but not information-theoretically dead and a close enough replica of them can be constructed and brought back, then bringing them back is better than creating an entirely new person.
I used to think that way, but it resulted in what I considered to be too many counterintuitive conclusions. The biggest one, that I absolutely refuse to accept, being that we ought to kill the entire human race and use the resources doing that would free up to replace them with creatures whose desires are easier to satisfy. Paperclip maximizers or wireheads for instance. Humans have such picky, complicated goals, after all..... I consider this conclusion roughly a trillion times more repugnant than the original Repugnant Conclusion.
Naturally, I also reject the individual form of this conclusion, which is that we should kill people who want to read great books, climb mountains, run marathons, etc. and replace them with people who just want to laze around. If I was given a choice between having an ambitious child with a good life, or an unambitious child with a great life, I would pick the ambitious one, even though the total amount of welfare in the world would be smaller for it. And as long as the unambitious child doesn't exist, never existed, and never will exist I see nothing wrong with this type of favoritism.