Anticipated Failures
The safety analysis done in the design phase obviously accounted for a single pitot failure, for all conceivable reasons. Could the safety analysis not have considered the possibility of all three freezing over nearly at once, at night, in cruise?
Couldn't Otto have been made smart enough to recognize a drop in all three measured airspeeds with little or no change of angle of attack? He should be able to fly pitch and power as good as a pilot could.
GB