I'm GMing a Fate Accelerated Edition game, importing quite a lot of rules and ideas from Fate Core. Although I've been a DM/GM for almost 25 years, it's my first time GMing a narrative-focussed game. After each session I find that different assumptions of mine about how things should be done are called into question.
Today it was the phrase which just trips off my tongue from more simulationist games:
"You're not there, you can't say that."
I'm sure it's a familiar scene: One player's PC goes off to do some delicate negotiation or stealth operation best done alone, but once there the player is struggling with what the PC should say or do. Another player starts trying to help, but is cut off by me, or another player saying, "You're not there, you can't say that."
Considering Fate is "Telling Stories Together" (FAE 6), is this just one more simulationist habit I should give up? I mean, character creation (and in Fate Core, world creation) is done cooperatively, so why not PC actions as well? Or does the game break down if players are allowed to interfere with other PCs actions like this?
So my question is:
Assuming the player controlling a PC is OK with it, is it legitimate or even encouraged in Fate for other players to suggest courses of action for that PC, even if their own PCs aren't present? Should I stop saying, "You're not there, you can't say that" in my Fate games?
I am aware that this question has the danger of being subjective, so I would like to ask for 'good subjective' answers, ie ones with solid play experience, not just raw subjective opinion.