That is, according to marlowe, you have to account for *every possibility*. Now that we know you can fly an airliner into a building, surely you're negligent if you don't armor it and prepare so that it *won't* collapse.
Which is of course, absurd.
Right now, they're talking about banning knifes - even in resturants - in the airport, and on the plane. (hope you like grilled cheese when you fly, and dont' insist on the crust being cut off).
Which is starting to miss the forest for the trees, again.
You're absolutely right, at least I don't know that you're wrong.
The designers never really planned for THIS contingency - and at some point you *do* have to say "well, we can't cover that".
Addison