First, sorry to confuse you with Art Rock (and vice-versa). It was late when I last posted.
Get some rest!!
Let me begin by correcting some of what you said of me. I haven't said that Bach or any composer is great. But I say (repeatedly) that much of Bach's music IS great. Let's use the word 'excellent'.
You misunderstand. My point was not about whether you had said "Bach is great" or "Much of Bach's music is great." The point was about language. About words and what words mean and, most importantly, how they mean. The word excellent is a synonym for great. It means roughly the same thing and, more importantly, it is the same kind of word, a value judgment.
Thus, you even think Bach's music is great/excellent yourself, though you quickly say it is great only in the subjective sense.
(emphasis mine, again!)
"Only" is your word. I would never say that anything is
only subjective or
only an opinion or anything like that. And although I agree that Bach's music is great/excellent--your replacement is only(!!) an addition?--that does not mean that I think that a value judgment has suddenly morphed into a fact. As for true, yes, I see how that might have been confusing. There's another component at work here, on another axis as it were: both facts and value judgments can be true or false. The sun is yellow is a fact and true. Bach was born in 1887 is a fact and false. Bach's music is great is true. Stockhausen's music is ugly is false.
You probably instantly recognize how much more difficult it is to demonstrate the truth or falsity of a value judgment over demonstrating the same about facts. That just goes to show how different the two really are, eh?
And here (with respect) is where the confusion begins. For, the simple fact is the music of this composer is ... objectively great...
And the confusion consists of calling a value judgment a fact--adding "simple" has no argumentative value, and making an oxymoron, "objectively great," just adds confusion to confusion.
Let me try to truly simplify: the words "objective" and "fact" point to one type of reality. A reality that can be proven. A reality that is outside the realm of opinion. One can say, for instance, "Cage is great in my opinion," but one would never say "Cage was born in 1947 in my opinion." His birthdate is an empirically verifiable fact, not an opinion. His greatness is a value judgment.
Which brings us to the other type of reality: the words "subjective," "opinion," and "value judgment" point to a reality that can be argued. Argued but never proven, though some things (like Bach's greatness) have been so accepted for so long that they seem to take on qualities of objectivity. It only(oh! I did it again!!) seems.
Is it (as you suggest) merely a matter of opinion ? A subjective judgement ?
I hope you know the answer to this. I would never say that something is
merely a matter of opinion. And all judgments, by definition, are subjective. There are good judgments and bad. There are true judgments and false. But there are no objective judgments. Objective belongs with with facts and with proofs. Judgment belongs with opinions and argument. This is all just Freshman English 101, you know!!
As you yourself even say -
An opinion is valueless by itself
Very true. Opinions and judgements should never be confused. They are not the same thing.
Even? No, no "even" about it. And to quote one quarter of a tightly constructed symploce is to destroy the meaning of the whole utterance. (And to go on to give that one quarter a meaning entirely alien to the meaning I had given it is simply dishonest.)
Opinions and judgments are
synonyms. They occupy (or perhaps I should say that they delineate) the same reality. An opinion is at the very least a type of judgment. (In conversational contexts, an opinion is a judgment that's not completely convincing. In other contexts, legal and medical, an opinion is a professional judgment. Surely you have heard the phrases "a legal opinion" and "a medical opinion.")
If the greatness of music is determined solely by opinions or by subjective criteria we end up with no objectivity and no rule of law whatsoever.
Only, merely, solely--this is starting to look like a trend! The greatness of anything is determined by opinions and by subjective criteria. That's the kind of word "greatness" is. I kind of understand the desire for one's opinions to have objective truth. Kind of. And if you'd ever been inside a courtroom, you would certainly know that the law is made up of little things called precedents, which are
opinions given by various lawyers over the years. I don't think this whole legal metaphor is working at all the way you seem to be wanting it to.