The name 'quibbler' comes from a Plato's Republic in an argument between Thrasymachus and Socrates. Think of it like a social-media flame-war in ancient greece:
Now, Thrasymachus, tell me, was that what you intended to say - that right means what the stronger thinks is to his interest, whether it really is so or not?
Most certainly not, he replied. Do you suppose I should speak of a man as 'stronger' or 'superior' at the very moment when he is making a mistake?
I did think you said as much when you admitted that rulers are not always infallible.