formulation 5:

[(mutual knowledge)]

• = know/believe/think/imagine/expect/predict/anticipate/retrospectively interpret

You know that I know that you know that X is good.
You know that I know that you know that Y is bad
I know that you know that I know that that same X is good.
I know that you know that I know that that same Y is bad.
We have mutual understanding that X is good.
We have mutual understanding that Y is bad.

Notes:

• voluntary exchange, mutually beneficial exchange, atomic transactions, atomic swap, mutually beneficial noncoercive exchange
• co-doing, co-moves, simultaneous complementary moves, we, separation, nonseparation, no boundary, etc.
• "Be good to each other."
• "Do the best you can to do exactly the right thing for both you and the other person, simultaneously, in each moment."
• "Act compassionately."; "Act compassionately, taking into account all time horizons and all possible futures."