Having lived in the same house for 54 years, and having parked outside it some 50,000 times, I recently parked outside the wrong house. Excuse was a defunct street light, plus I "latched" on to the wrong facade, which I thought looked slightly "funny". 1 in 50,000 is AOK for a parking location error, but totally unacceptable for a life threatening error.
HOWEVER
F Type pretty soon put me right.
Which means that the probability of two pilots getting it wrong is not my 1 in 50,000, but 1 in 50,000 squared, or 1 in 2,500,000,000. Which is much better, but still a bit scary.
A good argument for having two pilots.