Show One Show All - Equal Access To Information

 Show one, show all. Players are entitled to receive equal access to information about the contents of another player's hand.

After a deal, if cards are shown to another player, every player at the table has a right to see those cards. During a deal, cards that were shown to an active player who might have a further wagering decision on that betting round must immediately be shown to all the other players. If the player who saw the cards is not involved in the deal, or cannot use the information in wagering, the information should be withheld until the betting is over, so it does not affect the normal outcome of the deal