Does the GM belief the gamers to have their characters act with out utilizing out of character data?
Do the gamers belief the GM to be sincere with them as gamers (whereas nonetheless deceiving the PCs)?
Do they gamers belief themselves to separate what they know from what their character is aware of?
I disagree. It is much less about belief and extra about immersion. Are you taking part in a recreation, or a personality? Do you need to get into character? Or play the mechanics?