Captain heard (briefly) STALLSTALL, then it ceased. The a/c was flying substantially faster than 60 knots. Having heard it, then its cessation, the Captain was done entertaining a STALL, at least due "WARNING".
Almost certainly a contributory factor that degraded the Captain's perception.
I am the captain on AF447, I enter the cockpit, the right seater maintains the yoke to his stomach.............I have here very serious indications what the problem is, don't you think ?
Yes, I think you would. The fact that the Captain could not see where the SS was being held is surely another contributory factor that degraded his ability to perceive the situation.