In my view it's hard to give an account of right conduct where what is aimed at is not good.
Execution of a convicted criminal, where a society believes in capital punishment. It is not a Good act, yet it seems death to criminals is quite acceptable to LG Paladins. If it is not, they need to revisit their adventuring style.
But that's not the case I've been focusing on. (Nor am I talking about LG vs CG, which has it's own weirdness but is not what I am primarily talking about.)
You have never actually addressed the fact that LG, CG and NG will disagree on many issues, so they cannot all be "right" despite all being "good".
I'm focusing on the case where the PC commits an evil act and thus blots his/her alignment copybook - as a paladin, s/he loses his/her class features; or if not a paladin, let's suppose that the evil act is such as to make him/her change alignment. (And how does s/he know this? Because she casts "Know Alignment" or "Detect X" on herself every morning from her magic sword, or has a cleric henchman cast it, or whatever.)
Any act so evil as to cause, in and of itself, a change of alignment would need to be pretty heinous, which would seem to make its evil pretty obvious.
In this sort of case, the character knows that what s/he did was evil. And how can s/he reasonably dispute that within the gameworld? The metaphysical evidence that s/he acted evilly is irrefutable!
(If the gods are themselves fallible channellers of cosmological good and evil, that just makes things more complex. For instance, if a LG good makes a mistake and judges an action good that is actually evil, does his/her paladin who commits such an act lose status or not? According to the PHB s/he does, in which case the LG good presumably now has to concede that s/he got it wrong!)
You keep ignoring that vast Neutral ground between "good" and "evil". A case just on the cusp between N and E seems likely to be something that would only even be considered in truly dire situations, with some non-Evil motivator. Weren't you the one criticizing us for just tossing out hypotheticals upthread? At least our hypotheticals had an act, not just a "it's a close call the God gets wrong" descriptor.
My personal view is that every player is obviously a "special snowflake" - both in general, as an individual human being entitled to respect and dignity, and as a participant in a creative endeavour who is committing time and effort, and is entitled to commensurate respect and recognition.
"We are all unique individuals - just like everybody else!"
Not going to swim that far upthread. But, for one, you've got the "Leaving the villain to die" example, where N'raac has claimed authority of interpretation that only his interpretation is correct. Are you saying you cannot see an alternative interpretation?
Has someone provided a rules-supported interpretation that this is an Evil act, or a Good one, or are you just assuming there would be disagreement because all GM"s are myopic tyrants out to screw over the PC's ? Might there be a moral or ethical philosophy that would consider leaving R'as to die Good or Evil? I suspect so - [MENTION=42582]pemerton[/MENTION] is the expert. But they aren't the rule book authors, so their views don't change the rules in D&D.
You've got the "God of Beauty" example where you claimed that ritual scarification is not beauty. Is there no alternative interpretation?
That was a non-alignment issue. Given two GM's could come to opposite conclusions on what constitutes beauty, I guess all references to beauty should be struck from the game, correct?
More than zero? Only if you want to support your case, I suppose.
No, you're just telling Grog the Destroyer that what he believes is wrong. Yeah, that's not telling someone what they have to believe.
What are we saying is "wrong"? That Grog gets to define a universal standard of right and wrong, order and chaos and good and evil? Yes, I think that is wrong. He does not get to dictate the beliefs of others. Neither can anyone dictate his beliefs - being his values, not how they get defined by the rest of the universe.