I love reading your posts, Plotinus. You should write a book or something.
No more for the time being! The last one almost killed me.
I am perfectly willing to admit my ignorance here. Perhaps it would help if you gave me examples of clear and useful answers to important questions produced by modern (contemporary) philosophy.
Take an ethical theory such as utilitarianism, then. (In fact there are many versions of utilitarianism, so it's not a single theory but a cluster of related ones.) Utilitarianism tells you what makes an action right or wrong and it tells you how to live your life to maximise the good. Now of course not everyone thinks that utilitarianism is true - there are rival theories. But they are all perfectly clear and perfectly useful too.
The point of studying real science is that the results of this study have some concrete applications/can be used to predict natural phenomenons - there is some sort of benefit. Even some very borderline fields like political science have practical uses. What's the practical use of contemporary philosophy?
I'd say that the ability to think clearly and critically is of great practical use. Just look at things like the MMR scare a few years ago (the media reported, in an uncritical fashion, dodgy studies "showing" that the MMR vaccination gave children autism - as a result, morons throughout Britain stopped their children having vaccinations, and measles cases rocketed - something that wouldn't have happened if any of those people had been able to think critically and clearly about it). But that's not the important thing. The important thing is that you seem only interested in its practical use. My point is that an endeavour can have value even without practical use. I hope you don't think, for example, that early scientists did science just because they wanted to get something of practical use out of it. It was only after science had been going for quite a while that people found practical uses for its discoveries. Science - pure science at least - is done because people are curious about the world and want to know how it works. The same is true of philosophy. If you really don't think that pure curiosity and enquiry has any value then I don't know how to convince you otherwise.
Matter is a concentrated form of energy, as far as I understand the scientific consensus

Unlike the answers given by philosophers, this simple understanding has enabled us to tap into nuclear energy and use it to our benefit (or destruction).
And what's energy, then? To say matter is energy is just to say another thing about how it behaves. It doesn't tell us what it
is.
You can probably see by now that I am a practical person - when I do something, I want it to have some value. In my view, contemporary philosophy does not produce anything valuable - just more lengthy texts and treatises which only interest other philosophers.
Then you won't see value in philosophy. I'm not going to try to present philosophy in such a way that it acquires value according to your value system; I'll just try to point out to you that alternative value systems exist under which it has great value. You may not share those value systems but I hope you can at least comprehend them. That, incidentally, is a great benefit of the study of philosophy, in that it teaches you to appreciate many different ways of approaching the world, and forces you to engage sympathetically with views that you don't agree with.
I don't think I belong to any of the two categories, yet the question still seems valid to me. But as I said, I don't believe in my own infallibility, so perhaps if you gave me something tangible, some product of contemporary philosophy that is considered important OUTSIDE the field of philosophy, I'd re-evaluate this view.
I probably can't - but then one probably can't in most fields. How many people who aren't interested in astronomy care about the discoveries of astronomers? Or geologists? Or military historians? Or any specialised field that doesn't have obvious practical value?
So, in this particular case, you establish that right and wrong exist and then go ahead trying to find out how to say one from the other, right? But this looks awfully unreasonable to me - what proof do you actually have that there is such a thing like right or wrong? I can ask a linguist and he'll explain the origins of these terms, I can ask a psychologist and he'll tell me how people learn what's right and wrong and I can ask a cultural anthropologist who'll explain to me that right/wrong is a concept which differs wildly in various human cultures. I could also go see an evolutionary biologist who might tell me that right/wrong is a product of human evolution and natural selection.
So - I'll have some set of answers given to me by scientific disciplines I find relevant. With these answers, I'll be able to conclude that right/wrong as a concrete concept independent on human thinking doesn't exist. So, why do I need philosophy to speculate about it, when all relevant information I need were given to me by fields OTHER THAN philosophy?
But why do any of those answers tell you that right/wrong doesn't exist? The disciplines you mention tell you various things about people's
beliefs about right and wrong or explanations about the way that people act. But in order to conclude from these that right/wrong doesn't exist, you must be going beyond those things and drawing an extra conclusion. For example:
(1) If people's belief in right and wrong can be explained in terms of the evolution of human biology and society, then people's belief in right and wrong is false.
(2) But belief in right and wrong
can be explained in terms of biological and social evolution.
(3) Therefore, people's belief in right and wrong is false.
All that the scientific disciplines you mentioned can give you is (2). But in order to conclude (3), you need (1) as well. And where do you get (1) from? Is that something that science can tell you? No, it's not. It's a philosophical claim, and if it's going to be anything other than pure prejudice, it needs to be defended philosophically.
I've noticed that people who think that science has all the answers for philosophical problems often argue like this. They point to some established scientific claim, and they they infer from it something that goes beyond the mere scientific claim itself - not noticing that that very process of inference is philosophical, not scientific.
Now in the case of right and wrong, the question whether right and wrong exist at all is a philosophical question. It is not one that can be settled scientifically. In addressing it, philosophers will certainly consider evidence from science, linguistics, and all the other things you mentioned. They will try to draw conclusions from this evidence. But that process of drawing the conclusions is philosophy.
No, because history deals with questions I find relevant and often provides answers which are useful for human society. For example, by studying history we can identify the causes of contemporary events/problems which enables us to deal with them. How does that compare to philosophy? How is philosophy useful in this respect?
That is surely not the main reason people study history, though, is it? They study it because they find it interesting and because they think there is intrinsic worth in knowing about the past. If that knowledge has some kind of practical benefit, then that's a nice bonus, but it's not what it's all about. In any case I'm not convinced that the study of history very often yields practical results of the kind you mention.
Oh no, that's not what I meant. I meant that arts at least give us pleasure (sometimes), while philosophy gives us nothing we can't get elsewhere.
There's no such thing as "pleasure" understood univocally. The pleasure I derive from eating chocolate is different in kind (not just intensity) from the pleasure I derive from watching Ugly Betty (I can't deny it any longer). That's because there's no such thing as "pleasure" at all - all there is is activities that we enjoy. To say I derive pleasure from eating chocolate is really just to say that I enjoy eating chocolate. So if people derive pleasure from doing philosophy, that just means they enjoy doing philosophy. And clearly, they couldn't get that without doing philosophy. So it isn't true that philosophy gives us nothing that we can't get elsewhere.
That, incidentally, is the analysis of pleasure that Aristotle gives in the
Nicomachean ethics, and it is both a correct analysis of pleasure (in my opinion) and something that it is useful to know.
This sounds pretty much like the argument "you can't disprove religion without first reading tons of books about it".
Does that make it wrong?
As I said before, I admit my knowledge is limited. But since I am a layman, it should be pretty easy to prove me wrong with some concrete examples (see the question about the concrete tangible and useful products of contemporary philosophy).
Functionalism is a good example: a theory of the mind and its relation to the body that most philosophers today accept (including both monists and dualists, at least property dualists). Or in meta-ethics, the conviction that ethical claims are neither purely cognitive (analogous to scientific claims) nor purely non-cognitive (analogous to exclamations), but combine elements of both. More commonly, generally agreed answers to philosophical problems are not in the form of "This is the answer" but in the form of "The possible answers to this problem are this, this, and this, and here are the main advantages and disadvantages to all of them". For example, do we have free will? What is free will anyway? There are clear and generally accepted philosophical answers to these questions,
in the sense of clear and generally accepted alternative definitions of "free will", and clear and generally accepted advantages and disadvantages to them. Thus:
(1) To have free will means to be able to do what you want. It is a matter of self-determination.
(2) To have free will means being completely undetermined.
Of these, (1) is called "compatibilist" free will, because it is compatible with determinism. Someone who accepts this definition can answer the question "do we have free will?" quite empirically: if we are not prevented by external agents from doing what we wish to do, then we have free will - and this is the case whether or not determinism is true. Problem solved. However, many people find this an unintuitive definition of free will.
And (2) is known as "incompatibilist" free will, because on this view we can have free will only if determinism is false. The problem here is establishing how this would differ from sheer randomness. Also, of course, no-one knows whether determinism is true or not.
That is just a sketch, but it should at least indicate that there are clear answers available to that question which, through the history of philosophy, have become extremely detailed and refined. There is no consensus on which answer is
right, but there is consensus regarding the structure of the possible answers and how one would go about evaluating them and forming your own opinion regarding the question itself. That is a result, even if it is not the kind of result you might get in science.
Anyway, I'm sure that Fifty can come up with more detailed examples of this sort of thing, since he's the analytic philosopher. I'm just an early modernist - by your definition, a historian.