Human communication requires was to recover from ambiguity and a system that does hard require unambiguous communication without redundancy is bound to fail and in some cases take lives.
but still the more complete an engineer tries to design a system, the deeper and more disconnected will his omissions be, just because they represent human error or states of man-machine communications beyond what the engineer could envision.
STS - could you please translate?
Leaving a thrust lever in the CLB after touchdown and not detecting it is so completely wrong, that it has not been fully considered as an error situation.
Now that's a pretty broad statement - what do the AB trainers feel about it? Not to mention the odd AB software man.........