Morals sure as hell are math, just like everything else. I wasn't using the "save 10 children" to obscure your reasoning, I was pointing out an extreme case wh

Morals sure as hell are math, just like everything else. I wasn't using the "save 10 children" to obscure your reasoning, I was pointing out an extreme case where your reasoning breaks down. You can reasonably call someone who punches you in the face (without good reason) a "bad person". But if you find out they've personally saved 10 children's lives I'm pretty sure you'd think they were a good person. Plus what people mean when they call someone "moral" or "immoral" usually has to do with both their actions and their predicted future actions. Again, most people are fine with calling a reformed thief "moral" under certain conditions, even if they've never personally repaid the specific people they've wronged, because they don't seem likely to be immoral in the future. If you are not willing to do this you are in the minority. Your example is dishonest because murdering someone generally indicates a lack of self control or level of sociopathy that makes future violence incredibly likely. Also murdering someone purely because you don't like them very much or you have something to gain from it is generally seen as more evil than saving a life is good. If someone murdered in cold blood and then went on to save every starving person in the world, then they are also-fucking-lutley a good person. You might want to keep a watch on them, but that seems like a pretty strong indication their murderin days are behind them, and is way more than enough to make up for it.