Where there is no shared phenomenal experience there's no correct opinion. — Isaac
This doesn’t sound quite like what I mean, but I’m having difficulty explaining quite why.
I think a good illustration would be the parable of the three blind men and the elephant, which I presume you’re familiar with. As the story goes, none of the three men have shared their phenomenal experiences of the elephant yet. But there is still the correct opinion, that it is an elephant they are feeling. That correct opinion has to be consistent with all of their separate experiences. Nobody is going to come to that opinion without having all of those different experiences to combine together; and even someone who has had all of these different experiences still has to think up something that would account for all of them together.
So for any of these blind men to figure out what they’re really touching despite their differences of opinion (that all seem well-founded to each of them based on their limited experiences), someone is going to have to stand where the other ones stood and feel what they felt in order to have the full set of experiences with which their hypotheses about the thing in question need to accord. If the blind man doing that checking doesn’t feel what the other blind men reported feeling there, he’s got to figure out what is different between them to account for why they feel different things in the same circumstances.
That doesn’t mean he has to figure out what could possibly be a tree, a snake, and a rope all at the same time. It means he’s got to figure out what feels like a tree to this kind of person in this context, feels like a snake to that kind of person in that context, and feels like a rope to another kind of person in another kind of context. In the end, the investigative blind man will have a bunch of experiences with which the hypothesis of an elephant is consistent.
Where we don't know if there's shared phenomenal experience, we're better off proceeding as if there is because that we we might approach a correct opinion, whereas presuming there isn't rules out that possibility. — Isaac
It’s more that, as described above, we should proceed on the assumption that our phenomenal experiences are in principle sharable: that we can figure out what is different about ourselves and the circumstances we’re in that accounts for the differences in our experiences, and then build a model that accounts for every kind of experience anybody would have in any circumstance. That might be really hard to do, but we have a better chance of getting closer to doing it if we act as though it’s possible by trying to do it, than if we say it’s not possible and so don’t try.
So the opinion that I'm asking about is the opinion that right/wrong equates to pleasure/pain. That opinion seems not to be one which benefits from much shared phenomenal experience - people seem to disagree quite widely about it. — Isaac
This seems like a category error to me. When I talk about pleasure and pain etc, I mean them in a way that isn’t separable from the things seeming good or bad. If you like some experience, enjoy having it, then it doesn’t seem correct to call that painful to you.
You might still decide to bear some pain to get something else you enjoy, but if it’s truly pain to you then it seems analytic that you would prefer to avoid it if possible. If you could get a healthy fit body (which is enjoyable to have) without suffering from your workouts, you’d want that. You decide to bear the pain of the workout for the greater pleasure of fitness because the alternative seems to you like even greater suffering overall. You’re picking the path that seems least bad, even though it is still kinda bad — “bad” in terms of suffering and enjoyment, pleasure and pain, etc.
That is all a purely subjective assessment of good and bad so far; not an assessment that pain is bad etc — that’s just analytically true, “pain” is “whatever feels bad” — but an assessment of what is best on account of merely your own pain etc. Making it objectively just means concerning yourself in the same way with experiences that you personally aren’t having right now. In the same way that you could be an empiricist and be a total solipsist, believing that things you personally don’t see are not real; making such empiricism objective just means accounting for everything that “seems true” (empirically) to everyone in every context. Likewise, hedonism can be made objective by accounting for everything that “seems good” (hedonically) to everyone in every context.
The alternatives in both cases are either denying that anything at all is actually true/good (and so all our empirical/hedonic experiences of things seeming true/good are just subjective illusions all equally baseless), or else that whatever it is that is true/good is so in virtue of something besides our experiences (in which case we have nothing against which to gauge what is true/good, and just have to take someone’s word as to what it is).
And if we’re not even sure whether anything is true/good or whether we can figure out what it is, we stand a better chance of figuring out what it is (if that turns out to be possible after all) if we try, acting as though something is true/good and we have some access to (experience of) what that is, and then trying to account for as many pieces of that access (as many experiences) as possible.
When applied to questions of what is true, that results in empirical realism. When applied to questions of what is good, that results in hedonic altruism.