There really is no point in those posters constantly reminding us that the crew were wrong to try and incorrectly prepared to do this test where they did. Surely that is accepted? May I ask that we stop offering this established fact as the sole 'reason' for the crash?
What this thread needs to focus on is why the 'perfect/infallible' system was not. jcjeant's post now highlights 3 incidences where the root protection system did not function correctly. We should ignore also the 'why's and wherefore's' regarding pressure washing etc. It is apparent that what everyone thought was foolproof was not, and unfortunately the world is not short of fools to test this. How many other anomalies are lurking in the software? When and how will they bite? Will they only bite fools?
We still have 447 'unsolved'.