[pacman2]

"The test for patent-worthiness is: “would it be non-obvious to someone who is skilled in the art?” "

Well, nothing is harder to say than if something is "obvious". Locking backward, basically most things are "obvious".

"someone who is skilled in the art?"

This is another questions. What is "skilled"? Most patent courts assume an average person from the field of the invention and not an extraordinary specialist.