Dual Input
A couple of posts ago, somebody asked about inputs by both pilots at the same time.
Actually, the reaction to such a situation by the aircraft is not so different in a Fly by Wire Airbus than in any other aircraft.
If in a yoke equipped aircraft, one pilot pulls the yoke with a force of 30 Newtons and the other pilot pushes with a force of 15 Newtons, guess what, the strongest force wins and the yoke moves in the pull direction.
In an Airbus, this happens electronically: 30 N pull minus 15 N push is equal to 15 N pull.
The difference is - electronic addition is not felt by the pilots, they do not feel that the other guy is also handling the controls. With a yoke, you can feel whether the other guy is interfering with the controls.