[Jewbacca]

“If the co-pilot suffered a stroke”

The co-pilot had to be awake to keep re-securing the door to prevent the code from working.

[wtd]

It's not just the toggle...this could not happen because of a stroke - given the efforts made by the co-pilot with his intentional act to disengage the pre-programmed flight plan/ auto-pilot and resetting to the angle of descent while maintaining speed.