I am not a professional pilot, so it is not really my place to post on this discussion, but one thing is shouting out to be said.
The Turkish incident at Schipol involved a three-man crew with a safety pilot. It is not yet official and we do not know the other circumstances, but there is speculation on the other thread that the third pilot also failed to spot the speed decay etc.
So, my question is, was he operating as White Knight (and others) would like him to? That is, staying out of the picture, not raising a concern? You get my point.