Continuing then with the hypothetical discussion, as Ghengis said safe is more important than legal, how do you measure “safe”. Just because one pilot would not want to be descending through cloud with nothing but an ASI and a weighted key fob for guidance, does that necessarily mean it is unsafe? I suspect human nature means we decides that something was unsafe post-event, on the “did that scare the living daylights out of me” scale rather than any measurable objective scale. Does safe = no fear, and unsafe = frightening?