737er: Just meant that in an age when full automation was still considered too buggy for commercial flight, it would argue for a human failsafe, in this case an extra crew member on FD. And that includes the possibility of using physical force to deal with a rogue pilot. One good example is JAL 350, where the FO and FE overpowered the capt, and more survived (150) than would have had there been only one crew member on the FD.
Anyway, I'm off to bed. Have a great night all!