What do we mean by morality? You said earlier that there was a difference between "In my opinion, it is not good to judge others" and "In my opinion, watermelon tastes good." While I would agree that these are ultimately describing different types of preferences, at the end of the day, that is all they seem to be. Preferences. Subjective morality collapses into emotivism: expressions of what we like and dislike, nothing more.
I can certainly understand why it would seem that way, it's at best a loose analogy. While they are both value judgements, that's really where the similarity ends. For example, the mechanism for the value judgement of watermelon is obvious and purely biological...essentially tastebuds. Unless one's tastebuds are vague and neutral towards watermelon, one knows rather quickly whether or not they like it or consider it good. That physical reaction can then result in an emotional judgement of watermelon.
There is no such mechanism for morals, and that's a rather important distinction. I'm not saying that emotions play no role in the formation of moral opinions, they obviously do. The thing is, emotions aren't the only factor in forming moral judgements. There's a whole set of external factors like the prevailing moral opinions of society, religion, family, friends, work environment, etc. There's also other internal factors like personal experience, not simply emotion.
This is all rather obvious as people can clearly want to do something because it's emotionally desirable or satisfying, yet not do it because of these external factors which cause them to form the opinion that it's bad...and vice versa.
So while these may just be two differences between moral judgements and taste judgements, they are rather important. Both the mechanisms and genesis of the value judgements are entirely different.
I wish there was another type of opinion that makes a good analogy, but none comes to mind.
What's interesting here is that most people aren't going to get upset if someone else doesn't agree that watermelon tastes good. If someone were to assert that it is good to judge others, however, most people are going to try to contest that.
People can contest your opinion on watermelon as well. I don't see your point.
If we drop all notions of moral realism, arguing over who is right and wrong ultimately turns into a contest of who has the most power (rhetorical, political, you name it), so we're stuck in a situation where might makes right.
I disagree. I have a very strong opinion on child molestation, for example, and even if the entire world thought it was good...I don't see that as being capable of changing my moral opinion that it's bad. It's odd to me that you would even make this argument. Are your morals so easily changed?
On the other hand, if you're inclined to say that in your opinion, it is not good to judge others, but reasonable people can disagree, we're left in a very different situation. For a much more extreme example, in my opinion, genocide is bad. In a war-mongering dictator's opinion, genocide might be good, so can I condemn him if I do not think that his actions are objectively wrong?
This is another odd argument. What's to stop you from arguing that genocide is wrong if that's your opinion?
And if I do not think his actions are objectively wrong, do I genuinely believe that genocide is bad?
I don't know how you expect me to answer to what you genuinely believe about anything. All I can really do is take your word for it or think that you're lying. That's all anyone can do.
Either we hold that our subjective moral judgments are binding universally, even if they only our own opinions, or we do not truly hold them at all.
There's a false dichotomy if I've ever seen one.
What exactly is stopping anyone from understanding that everyone holds different moral opinions for different reasons?
Both results are troubling, though the first is of more interest to me from an Absurdist perspective, since it involves seeking binding obligations that can never actually exist. Morality in this sense becomes illusory. If anyone is comfortable with either of these outcomes, I would wonder if they actually cared about morality at all.
I'll just disregard this since it follows your false dichotomy.
There's nothing objective about the purpose they're built for.
Why would you think this? Do you think nothing can be created for an objective purpose if it's possible to use it for some unintended purpose?
If the culture as a whole decides that schools would serve the society's needs better as centers for indoctrination, then the purpose of the school changes. If the fundamentalists took control of the country, why would it be inappropriate for them to decide that a different direction would better suit their goals?
If everyone decides to use hammers as weapons, does that change the fact they were created to pound nails?
Or are you asking me for my personal opinion on what schools are for?
Evolutionary psychology, cultural evolution, and rational thought. I don't see what's controversial in the idea that certain behaviors work out better, both for the individual and the society, than others.
Better, in this context, is an entirely subjective notion. I could rationally argue that 49% of the population would be better off if the other 51% were killed off.
If you're literally talking about the specific mental states associated with moral reasoning--joy, surprise, horror, whatever--that's an entirely separate question.
Neither rationality nor emotion can entirely account for moral opinions by themselves. There's a great many factors involved and the weight of each factor varies from person to person. Again, this just shows the subjectivity of morality.
What earlier assertion? I've just been arguing that relativism collapses into nihilism, nothing more. You're the one mixing objectivity and subjectivity in increasingly strange ways.
This is the assertion and you're the one who introduced subjectivity (and objectivity if I take your Plato reference correctly)....
"If someone is a Platonist, then the discussion changes, but subjectively producing meaning is like subjectively producing morals--drop the transcendentals and it's sleight of hand, nothing more."
If however, you're now saying that morals and meaning are subjective...and I can understand why you would....then it's all rather easy for an atheist to decide on his own meaning to his existence.