It is in no way a violation of the rules to tell your opponent what you have.
“Exposing of a hole card is a possible violation of the rules. A player could call the floor over for a ruling and request the players hand be declared dead.”
ACCIDENTLY exposing a hole card is not a violation of the rules. The card that is exposed to one player, is exposed (shown) to all the players, and the hand continues.
“It is in no way a violation of the rules to tell your opponent what you have.”
It is considered bad poker etiquette to discuss your hand while the hand is being played. OTOH, it is considered good playing to lie about what you have in your hand while playing. Go figure.
....Bob
Correct. It's not a rule violation--although when I was down in Reno for the World Poker Tour events in which I played players were strongly discouraged from doing what Gold was doing in the Main Event of the WSOP last year--but it's more of an annoyance than a rule violation. Thanks for catching that for me.