I suppose what the Parent was getting at, is that it doesn't make any sense to have two sets of completely disconnected flight controls in the cockpit. That's a

I suppose what the Parent was getting at, is that it doesn't make any sense to have two sets of completely disconnected flight controls in the cockpit. That's a lot like having two different mice plugged into your computer at once... I can't think of a situation that would warrant one flight control being pushed and the other pulled... Most aircraft have both sets of flight controls physically connected (either via direct links, or actuators driven by flight computers). So if one pilot pulls back, the other set of controls comes back as if it's being pulled on. One of the advantages of this design is both the pilot and copilot can be aware of what the control input is at any given moment.