Apologies again if this is silly or off-topic.
There is a possible chain of events, being discussed, that starts with the failure of the Pitot probes. Does this imply that at least two probes must have failed (almost) simultaneously? I saw mentioned "EFCS PROBE 1+2/2+3/1+3" sitting next to "F/CTL RUD TRVL LIMIT FAULT". How exactly is it determined if a probe is failing: is it some low-level status related to the probe itself (heating?); or is it determined e.g. by comparison with the other (one or two) probes? Also, I assume that power for the 3 Pitot heaters comes also from different buses?