Hey Dave,
Literacy licence allowing some "degree" of freedom?
Certainly, but you wanted 13 degrees.
"Now let's see. If it was a 24 hour clock, would it be only 3-degrees off."
As you are aware, I'm a thoroughly professional pilot who has to be so precise and positive in everything I do, so I would probably answer: "Er, yes, maybe, sounds about right!! Or maybe not...'ere, 'ang on a mo' me watches stopped again