Showing a player a rule.........

[mcrowder]

Here's what I'd do.

Make sure you know what page the rule that was in question is on. If THEY approach YOU, in a cordial manner, say something like, "Oh, that was you guys? I do so many games that the teams run together. But anytime there's a serious question on the field, I look it up that night just to make sure I have all of the wording right. I looked that up that night after our game." Turn to the right page, and let him read it.

If they don't approach you, act as if you truly do so many games that the teams run together, and you never carry anything forward from previous games. (Which should be what you do anyway). When given the chance after a sitch like this, I often try to defuse any leftover hostility by acting (and it isn't always an act) like (and talking like) I don't mentally keep track of which teams I've had disagreements with. Each game is new, and the past is in the past.