Hi DozyWannabe,
If - and *only* if - you see them. Many haven't.
If you read the cvr transcript, both crew knew they were close to the stall.
Air Florida Flight 90 - Wikipedia, the free encyclopedia
16:00:45 CAM-1 Forward, forward, easy. We only want five hundred.
16:00:48 CAM-1 Come on forward....forward, just barely climb.
16:00:59 CAM-1 Stalling, we're falling!
16:01:00 CAM-2 This is it. We're going down, Larry....
16:01:01 CAM-1 I know it!
Birgenair Flight 301 - Wikipedia, the free encyclopedia
The co-pilot and relief pilot both seemed to recognize the approaching stall and tried to tell the captain, but did not intervene directly, possibly out of deference to the captain's age and experience.
That's a CRM problem. The other pilots recognised the approach to the stall.