[Rich Ives]

Try this approach (example fitted to the original question).

"I read rule 7.05(g) I think I remember it saying the award is two bases from the runner's position at the time of the throw. Do I remember it incorrectly?"

You thus demonstrate a base of knowledge without telling them they're wrong.

If they disagree, get out the book and say "Gee, I guess I'd better re-read it."

Read it (to yourself).

Then, put on a puzzled look, hand one of them the book, and ask him to help you understand how you are not getting it.