Retired F4
Thinking back to the long post in re the two year symposium on stalls and stall training, and given that the pilot was apparently able to make some roll inputs, at some point would a roll toward 90 deg force the nose to fall (I am guessing the computer at this point would not curtail roll at 67 degrees, which is the advertised limit) and do sort of what your drag chute did for the Phantom?
Granted, if you are in a stall, rolling (and likely an out of balance condition if the rudder control isn't just right) could lead to something like an erect spin, or a stall-spiral hybrid ... but once the nose starts pointing down, would that not unstall the THS in your illustration?
PS: appreciate your pointing out that there are two airfoils in question, either of which has a critical AoA, and either of which
could stall.
But ... and I may be arse backwards here, if THS stalls, would that not lead to a pitching down moment?
(If I have that arse backwards, apologies)