I have been a coach. Then I started umpiring and coaching (not in the same game obviously). Now I just umpire.
I don't think I would have any problem providing RULES assistance to my son's coach, only if he wanted it, during the game or after the game.
When I coached, I certainly had no problem attempting to explain a correct ruling to a fellow umpire if he was in the process of blowing it. Most of the time it was an umpire who did not work the same games I did and he did not know me as an umpire.
Hope that answers the question.
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