I want to make sure I'm not misunderstanding EN-etiquette.
Say person A is interacting with people B and C about point X, but the posts of B and C haven't really crossed. Further, say person A has agreed on something with person B. Is it true that person A should act like none of their interactions with B ever happened corresponding with C, and they should make person C attempt to relitigate the same thing?
For example:
A: All uses of pineapple are bad
BtoA: What about shish-ka-bobs?
CtoA: All the time always?
AtoB: Ok, that's one exception
AtoC: Yes, all the time always, prove me wrong
<insert B being flabbergasted to this and each of the following>
CtoA: How about pizza or tacos
AtoC: Yuck! No reasonable person thinks that. Try again.
CtoA: You can't mean that!?!? What about on ham.
<go up to the Yuck again, and have C say anything else except shish-ka-bobs>