Um actually you're wrong, what you're referencing is Poe's law,
Cunninghams law is "whoever smelt it, dealt it"

That's true now, but Murphy actually said "if there's two ways of doing something people will do it wrong every time"

What can go wrong will go wrong was Finagle's law until Murphy came along with a better name for a similar rule

But Murphy's rule was better before as it gave a solution: ensure there's only one way to do a thing

Murphy was a test subject for acceleration tests on rocket sleds. One run was ruined as all the accelerometers had been plugged in the wrong way, so no acceleration data was collected