An earlier poster (peekay?) wrote on some boeings "each sIdestick controls half the control surfaces". So if one pilot commanded left and the other right, it would command up aileron/spoiler on both wings(!!)? Please someone tell me that's nonsense?
I know nothing of Boeing FBW, but...
1. Boeing does not have sidesticks.
2. Control columns on all Boeings are mechanically inter-connected, so even on FBW aircraft they are most likely to give the same commands to FBW system from either left or right control culmn.