"When the captain came to the cockpit, it was already impossible, aerodynamically and CRM-wise." since the a/c was above 35k - over 3 mins from impact..
Why is it 'a given' to some posters that the 'stall' was unrecoverable,
Because it was the very exact moment they stalled, at time 12:11:45, when the captain entered the cockpit.
"impossible" is maybe a bit to stark, I should have said "most probably". It's not only about "would it be theoretically possible" but "could they have find it out that they were stalled" and thus recover. If they knew for sure that they were stalled, it might have been possible of course. Probable, but unlikely.