Surprised by the System output and worse: Had to process garbage
generated by the System.
And failed in their decision making. Actually, worse than that,
never realizing (in time) what was going on...
You might be picking on detail, but the underlying sentiment and
concern about various aspects of the design is, imnsho, quite
correct. If the systems fail and give no information, then fine,
but to fail and give incorrect information is extremely dangerous
and almost certainly contributed to this disaster. The present
systems do not degrade gracefully at the edges and in fact they look
decidedly brittle. Now i'm just an engineer with some, but not
much flying experience, but I would expect any safety critical
design to be far more robust at the limit, irrespective of whether
the designers ever expected those limits to be exceeded.
But hey, let's not criticise the coffee, or cast aspersions about
any aspect of the airbus design, lest we are buried in the smoke
screen of irrelevant detail ;-)...