AnthonyGA,
Yes, no and maybe.
In the analog days, we had TWO physically separate and distinct channels, one monitoring the other. If they disagreed, they disconnected. The probability of the same op-amp or same resistor failing identically at the same time was infinitesimal.
When 'digital' came along, I had qualms as well, but dissimilar processors and dissimilar software between 'command' and 'monitor' mostly were supposed to have solved their 'identical failure' problems.
Some of those concepts now seem to have gone out of the window, judging from some recent posts elsewhere.
So far, we have no idea whether this incident is again ice or something similarly mechanical, or indeed "IT" related, so let's give it a break until we have more data?
Cabin crew spilled some Coke on the pedestal during the last flight and it now soaked through? Weirder things have happened.
I sincerely hope the QAR/FDR data will tell a useful story.
CJ