If the exercise is an examination, I am acting as a GCAA delegate and am required to pass or fail the candidate based on their performance, without coaching or intervention. Failing to get the TLs to advance during a go-around (the instance that springs to mind was after failing an A/T below 200'on an LVO approach) and allowing the speed to decay to the point of an "AIR SPEED LOW" EICAS clearly does not meet a standard that passes that test.
Now, after that failure has been assessed, I can use any remaining time to train the problem, but it remains the case that that exam on that day was failed
That's fair enough Wiz, I was referring as to fail someone for not keeping the hand where it should be as you previously said, not failing someone because the airspeed has decayed to the point of a Master Warning as you said later.