Uh, no. The nature of reality can not be figured out the way innocence or guilt can be decided in a court of law.
What do you mean by the nature of reality. We are talking about behavior (whether a person is acting as though morality is subjective or objective). Whether morality is subjective or objective doesn't matter in determining behavior. Sometimes courts use morality to discredit a witness IE bring up their marital affairs to show they have no scruples thus discrediting the witness.
If a person says I am a liberal but acts like a socialist in life then we can conclude they are really socialists by their actions. Likewise, if a person claims subjective morality but acts like there is objective morality then we can conclude they believe in objective morality deep down. It is the hostile witness against subjective morality that gives weight to the evidence.
Acting like morality is objective doesn't make morality objective.
It is not just acting like morality is objective. It is being a hostile witness against the persons own claimed subjective morality that gives more weight to objective morality being real. That's because something within people acts against what they like to think is the case. This points to something beyond them, outside them is causing them to act and react this way.
It comes back to the logical argument. We are justified to believe objective morals exist on the basis of our lived moral experience. Until someone comes up with a defeater of that experience we can be justified to believe it is a real representation of what reality is.
Any defeater of our moral experience would have to be as good as a defeater of our experience of the physical world and that we are not living in some virtual reality. It would have to completely show our experience of objective morality is totally unreal and unreliable.
Because once again you are insisting that people use words in a strictly technically correct way when communicating via that language.
But people don't do that.
Back to this again. I replied to your last claims and showed that there is an important distinction being made but you didn't reply. The implication for saying it was just an opinion when someone takes a stand on a moral act is it negates that stand because they are not really saying it is wrong truthfully but rather just offering an opinion (I think) it is wrong. So why make the stand in the first place.
But people don't want to project that indecision or being unsure when it comes to a horrible act. They condemn the act and the person doing it. They even protest in streets that its wrong and threaten people who did the act as the act should never be done. People argue and try to convince others that the act is morally wrong like its a "truth" statement.
If they are trying to convince someone why would they undermine their own argument with just an "opinion" it is wrong. The other person could say I don't believe you because it's just your opinion. You have no basis for claiming its wrong so why even try to convince or argue with them.
But in real life, people don't do that. They take a stand on what they believe is right and wrong and make "truth" statements to bolster and support their stand. That's because they know the act is either right or wrong and not (I think) it may be right or wrong or neither right or wrong.
Everyone knows it? Are you assuming this in order to prove your point?
No the evidence is there for all to see through lived moral experience. Just look at the way individuals, societies take stands on morality like there is only one way to see it. They protest, condemn, and impose morality on others with codes of conduct, laws, and rights.
There is no room for subjective views. Just look at the way someone sees a wrong like rape, child abuse, stealing, discrimination, etc. They say it is wrong and that no one can rationalize it into being OK despite subjective views.
When you say that it is based on Christian values, do you realize that many religions support the same values? It's not exclusive to Christianity, it's just plain old human decency.
But Christianity through Christ is the only religion that claims that they are the truth on morality and that all other religions are wrong. I have given a video for showing how we can determine Christianity as the only true religion here.
http://www.youtube.com/watch?v=nWY-6xBA0Pk
http://www.youtube.com/watch?v=RRyq6RwzlEM
But in saying that all religions more or less have the same values and that it is common decency that shows that everyone intuitive knows about what is right and wrong. It seems a mighty big coincidence that everyone independently came to the same conclusion on morality.
Though not evidence in itself for objective morality based on numbers it does add a small piece of support along with other supports mentioned (lived experience) that there are objective moral values and duties.