Okay, question then for you Nico? Where do you draw the line between where reality stops and where beliefs and ideas begin?
It is obvious to me that beliefs and ideas are part of reality. The question is, if it is an idea or belief about something, is there this something they are about really existing and how good do they match it?
You say that something like the scientific method is ill suited to the discussion of something like ethics, but I disagree, using the scientific method we can make all sorts of tests and predictions and experiments that determine how people respond to certain stimuli and such.
Well, I don't say science can't contribute to ethics in some way. But it never hits the truely important part of ethics: Ethics, at it's heart, is dealing with norms, science aims to describe. Descriptions of how things are might be helpful in organizing things how they ought to be, but they do utterly fail in determining how they ought to be.
Can science tell us what is right and wrong? No, because those are subjective human ideas, we created them, so we get to decide what they mean. That said, once we've decided what they mean, we can use science to determine if something falls into one category or another. Science is useful for building the map of reality, in fact, I would argue there is no better way to map reality, because any other way to map reality fails to take that reality into account when making the map.
Well, it is far from obvious that right and wrong are nothing but human ideas, based on convention. I highly doubt it. Even so, if you point out that people have different ideas about what is ethically right and wrong you are right about that. One can easily have different ideas of the very same thing, based on perspective: Like a cylinder that, from one perspective, seems to be a cricle and from the other perspective a square - until you realize it's neither, properly. Also, people can and do err.
So, there are plenty of reasons why people might have in part vastly different
ideas about what is ethically right, when those all are in fact based on what actually is ethically right.
If you subscribe to ethical subjectivism your approach might work out. But you will get into trouble at the very first step: With working out what they 'mean'. because, if ethical categories are merely conventional, then there is no obligation to agree on a meaning at all.
Thus, ethical subjectivism seem to be on the one hand kind'a self-defeating to me on the other hand missing the entire point of ethics: that there are categories that have normative power.
Suppose you write on a sheet of paper: "(1) Everything on this sheet of paper is true, (2) The mass of a helium atom is 20 grams." If that trick actually worked in real life, you would be able to know the true mass of a helium atom just by believing some circular logic which asserted it. Which would enable you to arrive at a true map of the universe sitting in your living room with the blinds drawn. Which would violate the second law of thermodynamics by generating information from nowhere. Which would not be a plausible story about how your mind could end up believing something true.
Experimental data and observational data are necessary for the construction of an actual map. You can't make an accurate map of a city you've never been in from inside a locked room with nothing but a sheet of paper. How else would you do it that wasn't just pulling the information out of thin air and stating it to be correct? If not by experiential or observational evidence, if not attached to something, then your belief is floating, not connected to anything but itself and other beliefs, without changing your anticipated experiences. How does your anticipated experience change as a result of a certain belief, and if it doesn't, then what purpose does the belief serve to aid you in navigating the world?
Well, this is kind'a true if you deal with the natural world. Yet, in fact, mathematics does things exactly what you suppose in your thought experiment. It starts with axioms, which are simply taken to be true and extends from there on by various mathematical operations. Whatever you get there, there is no need at all that this connects to the natrual world as examined by science. Like, you will probably never, ever find a perfect circle in nature. It's a pure object of thought, if you will. (And of course it doesn't has any impact on the working of the laws of nature, the information isn't coming from 'nowhere', because your body is an open system and it's pulling the energy needed in from out there.)
Yet, you build a map of the mathematical reality. You find mathematical truths. and some of these are even applicable in the natural world. In fact modern science depends on mathematics to work. Which is kind'a funny: You need maths, that couldn't care less for the natural world, to describe the natural world effectively and exactly. Many of the breakthroughs of natural science wouldn't have been possible if mathematicians would have cared to make their theorems match the 'natural world'.
A belief in something like freedom isn't unscientific, a belief in a certain system of ethics isn't necessarily unscientific either. On the contrary science, by telling us more about the world, has a great potential to improve our systems of ethics. We know thanks to science that there's really no difference between races, we know thanks to science that animals aren't so different than us, just as two examples.
But again, that is really not doing anything, directly, in ethics. While we now know that there are no biological races (Science doesn't tell us that there are races, which are not different. It tells us that because there are no really distinguishing inheritable differences, it makes no scientific sense to speak of different human races.) withing the species Homo sapiens, that doesn't really mean that we should treat dark-skinned people the same way as light-skinned people. Only if you add the premise that 'if there are no biological races, then all humans should be treated the same', then anything follows for ethics from those scientific findings. Also, one shouldn't be silent on the fact that ethical considerations had influence on the definitions used for 'race' in biology after WWII. Nowadays biologist rarely, if at all, speak of 'races' because of the baggage of the term. What's used usually instead is the term 'sub-species'.
Similar things are true for the cat example. So, science has at best an auxiliary role in ethics. So, while in a sense all knowledge is ethical, for example it really helps to know that fish need oxygen in the water to breathe and that under certain conditions oxygen gets scarce in a fish bowl, that is really ethically neutral until you add the premise that 'You really should not let your pet fish die!'. And what you should or should not do with your pet fish won't be derivable from scientific knowledge.
Furthermore, scientific knowledge can be used to commit unethical acts. If you do know the conditions that lead to a drainage of oxygen from water and that fish need oxygen, it is quite easy for you to kill the fish, even if you shouldn't do so.
So, scientific knowledge is
instrumental, while properly ethical knowledge is not. Ethical knowledge sets ultimate goals.
I can easily believe in freedom, freedom is a particular idea that is generated in the human mind by a particular arrangement of firing neurons, and it might have slightly different connotations to others. I can even believe that freedom is a good thing based on the knowledge that other people are like me, and I don't like having no choices, so they probably don't like having no choices either.
Well, but all that doesn't mean that people
should be free. There's nothing normative in this consideration of freedom so far. You're merely describing things. To make it ethical, you need to add a premise of the type: "If people are like me and don't like haveing freedom of choice, they should have freedom of choice."
Also, while I'd would agree that the 'idea of freedom' can be described as being generated in the brain by firing neurons, it is a stretch to come to the conclusion that this is a full description. I highly doubt that it is, because natural science doesn't aim at giving full descriptions. It's aiming at generalized descriptions. Anyhow, even if it would be a full description of how the idea of freedom is generated, it would be a far stretch, again, to say that freedom is nothing but that idea that is generated in the brain.
Science is a tool that is used to increase our understanding of the territory, so that we can have an accurate map by which to navigate. Its clear that having a more accurate map leads to more ways to use the territory as evidenced by our increasingly powerful technology as our map has grown more accurate. Science is the most powerful tool we have, and there is no reason not to apply it to everything we can. There is no special barrier beyond which the scientific method cannot be used.
And yes that does end up requiring science to prove itself, but why would you not attempt to discern the truth using the most powerful tool in your arsenal? There's no reason to throw the baby out with the bath water. You can't step outside of yourself so you're always limited to using your own mind.
Of course there is! Science has boundaries. It is tailored to examine the natural world. If you examine the history of science and read up on the theory of science you will notice that what is nowadays simply called 'science' was and still is but one field amongst others. The idea that because science has been so successful in examining, explaining and then predicting the field of study it has been it has to be ablke to explain everything is outright absurd.
Let me try to put it into an analogy: Say, for some reason you put really great effort into developing a tool to drive bolts into stuff. No, you don't have just a screwdriver. You really put some effort into it: You applied a clutch to it that slips at a preset torque. It is electrically powered. it comes with a ratchet action. And it looks just badass:
Yeeehaaa!
I love that baby. (Actually, I have no idea if it's any good. I just think it looks hot (for a screwdriver)! This is no endorsement of the product!)
Furthermore, let us assume that for whatever reason soever, the guys responsible for getting the nailing done stuck to their simple, manual hammers:
So, arguably and near to certainty without a doubt that screwdriver is
the most powerful tool in your toolbag.
Why not using it for everything?
Kind'a obvious. If you have that great screwdriver, every problem might look like driving a screw in. But that doesn't make it so. Use the screwdriver where it is appropriate to use it. Just like the other tools, which you hopefully didn't throw away.
Don't screw around with that thing!