The difference, you would say, is that the scientists rely on physical observations. But moral judgments rely on observations as well, or intuitions – perceptions about the world. You may assert that these are just emotions, but you cannot defend this assertion with any evidence.
The difference is that scientific findings are based on repeatable experiments conducted on observations – experiments that will lead all observers to reach the same conclusions. Moral judgments are just value judgments made about the situation.
For example, any intellectually honest person will look at the evidence for the theory of relativity and accept the conclusions that follow from it. But lots of people can and do differ over the mere question of whether some act qualifies as moral. To take my favorite example, a Hindu thinks that eating a hamburger is an act of immorality; we here in this culture think of it as fast food. There’s no intellectual dishonesty going on there – people are just judging according to different values.
Scientific conclusions don’t depend on any individual observer; that’s the reason that they rely on repeatable experiments and peer-reviewed journals. Something doesn’t become “scientific” because one guy with a degree says so. Science is something decided by a body of experts looking at evidence that needs to be sufficient to compel belief in all reasonable people.
Morality is nothing of the sort. It might be “based on” observations – in the sense that it’s a judgment about observations – but nothing about the observations
compels moral judgment the way that scientific evidence
compels belief. What about the act of eating a cow will convince all people that it is immoral, exactly? Or, to back to the example I used earlier, what is it about the death of a family member that will convince all people that it is “bad”? As I demonstrated, there are other people – including possibly the ailing family member herself – who would consider death to be “good” and “better.”
All moral questions depend on perspective. There’s no such thing as morality outside of perspective, and I would be interested in seeing someone demonstrate otherwise.
The proposition that “my mother experiences consciousness” is unfalsifiable, and yet I do not think that my belief in it is irrational. It is a perception about the world, a perception I can only assert, not argue for. And yet it is a perfectly “sensible” belief.
You need to learn what a logical inference is. There are plenty of things that we cannot prove absolutely yet still rely upon. The reason I’m claiming that morality is a value judgment is not that I can’t prove otherwise – it’s that it’s the most logical inference based on the evidence.
Given all of the evidence available to us – that brains produce consciousness, that all people that have ever existed claim to experience consciousness, that all people who have ever existed demonstrate behavior that seems to point to their experience of consciousness – it’s a very, very safe bet that your mother experiences consciousness, and it’s based on a great, great deal of evidence.
Moral judgments, though, necessarily require a standard for judgment, and standards are always based on an individual’s values and position in the world.
What we’re talking about here is whether morality exists outside of judgments. The evidence points to the fact that moral judgments are entirely dependent upon individual perspectives, and there is not a single shred of evidence to suggest that morality exists outside of those perspectives and judgments.
If it does exist outside of judgments, then how do you propose to determine whether eating a cow is “good” or “evil”? How do you propose to determine whether the death of a person is good or bad?
You always judge from a standard, and if you go back far enough, the source of that standard is simply your values.