If I misinterpret Lyman I apologise but I rather think he is driving at one of two things. Firstly, a problem with the pitot tubes in which case UAS procedure pertains. Otherwise, failure to follow SOPs - as we know these were not observed. Either way we are left with a human factor issue. The difficult question, why were drills, SOPs and the like ignored? For everything else our shoal of red herrings is now following the trail of clotted cream (and that is a mixed metaphor!).