Sleep inertia as a possible factor in this accident I think has considerable merit. Looking at how people function when they are sleep deprived does throw up interesting parallels with what we know of the reactions of this crew. It does tie in with the professionalism issue and here I should stress that I am not using professionalism as a value judgment but as a being able to act so as to provide the best possible set of responses in any situation. This issue is cultural but I don't think can be directly taught either. A pilot has to want to follow his exemplars and be like them. Any pilot needs to be aware of all the factors that might limit his/her performance and how to mitigate them as much as possible.