Huh?So is D&D not a good system because it doesn't work like your preferred system?
You asked about what happens if a GM and player, or two players, become confused or contradictory in respect of the fiction. And I replied that "A good RPG has formal or informal processes for resolving this."
I didn't say anything about whether or not D&D is a good system. I know that when I play D&D, there are processes for resolving confusion or contradiction - generally informal one. I don't know how you handle it when you play D&D.