Query concerning Law 45
Law 45 C4(b) says a declarer " may correct an unintended designation of a card from dummy [ ... ] after a slip of the tongue ", but not otherwise. My question is simply this : what constitutes a "slip of the tongue" ? The only situation I can think of is where a declarer has two or more cards of the same rank in different suits and calls for the card from the wrong suit, i.e. asks for the Jack of diamonds when they really wanted the Jack of hearts.