bobmac
Major Champion
Problem is that simply giving/getting a Ruling makes most of those who query 'happy'.
So how does anyone know that they should, or shouldn't, be happy with the Ruling a Pro, or anyone else for that matter, gives them.
Because the pro will be able to show the appropriate ruling in the rule book/decisions book. That's part of the reason the referees carry rule books with them in tournaments.
But if you'd rather ask the barman, feel free.