Cobain didn't have the skill to play precisely. He lacked the ability to play the technically demanding things that highly refined guitarists like Dyens can. This isn't a knock against him, because obviously he had no need or desire to be more technically proficient.
Pure conjecture, my friend. Not an inch of anything beyond pure conjecture. Cobain demonstrated some skill at guitar, it is my hypothesis that he intended to play sloppy but could have easily played precisely if he wanted to. You call it technically proficient... but we can't know what the artist's intentions are. How accurate at playing is actually something we cannot know, as we do not and cannot know what they intended to play.
Dyens was *more* technically proficient in *more* areas than Cobain. Therefore he was more technically proficient overall.
This is not certain. Perhaps he is, perhaps he is not. The point is that it requires subjective judgment to decide it. It's fully possible for someone to consider classical "skill" to be simple compared to rock "skill." You might say this is an art judgment, but that's not what it's about. You've never stopped defining skill, when I've already shown that to define skill is subjective. One could argue that learning classical guitar craft is straightforward and less 'difficult' than learning the ability to play with the necessary command of "style," "feel," and "groove" of rock. Making something sound Earthy is a musical skill, and is it one that Roland Dyens can accomplish? Maybe he could, maybe he couldn't, and that's all I'm arguing. Plenty of people would argue that there are simple tricks and methods to being able to play jaw-dropping guitar parts whereas rock requires skill that is "more legitimate" and ostensibly more "difficult" because it is potentially less static.
If a musician skill can't be measured, how the hell does Juilliard operate? This is beyond absurd.
Music school... heh, a notion I have never supported. But that is classical music. We've already established that to declare the classical standards as the measure of skill here requires one to make a subjective judgment by defining the hierarchy for skill. Juilliard is no mystery, they define their vision of skill and conform others (students) to it. But just because they do it doesn't mean that they hold the ultimate truth that we shall conform to.
Fuoco. You are telling me that playing this doesn't require more skill than playing "Hot Cross Buns."
I'm making no specific judgments on what does or doesn't require skill, on postulating possibilities. Skill is an loaded word, everyone brings their own meaning to it. If someone defines skill as playing the work of most difficulty, maybe someone who has been playing since they were 2 finds it very easy to play the things we generally percieve as being complicated, while someone else has a very difficult time playing hot cross buns, and when they master it they are playing something that caused them far more difficulty. If someone defines skill as complexity, then the vast majority of people will agree that the Dyens performance is far more "skilled" than (an average) Hot Cross Buns. But that still requires setting a non-decisive, non-consensus definition for skill. Because of the different potentials for skill's meaning, we can't ever say definitively that one player is more skilled than the other.
I'm sure there are thousands of cases were most of us will agree that one is more skilled than the other, based on our own definitions or even upon a definition decided upon by our small group. I'm not at all trying to argue against that. Technical ability makes sense in theory and it can be agreed upon in groups. The thing is, it's impossible to say definitively, and this becomes extremely important in the world of music where there are the tens of problems I've explained that make a distinction such as "so-and-so guitarist is less skilled than so-and-so" extremely subjective, and never definitive.