pran, on 2017-August-19, 10:58, said:
I favour great care when applying laws, whether they are gamelaws, penal code, civil laws or whatever.
And my legal thinking here tells me that playing another card to the trick is a separate irregularity. Dummy may not be the first to call attention to this irregularity, nor may he use this second irregularity as a permission to call the Director on the first irregularity (which is now disclosed but not yet called attention to by anybody).
I still understand the clause "call attention to an irregularity" as referring to an action (usually a statement) by a player to the effect that there has been an irregularity.
An attempt to prematurely rectify an irregularity is not as such calling attention to that irregularity.
Sloppy of me. When a defender whose turn it is to play puts a card face up on the table, presumably he's playing to the trick. When he puts a second card on the table, he may be playing a second time to the current trick (Law 45E1), leading to the next trick (Law 53A if it's out of turn), or correcting a revoke (Law 62A). The context, in particular the lead to the trick and the first card the player in question played, may give us a clue. If he's correcting a revoke, then his second play is not a second irregularity.
If attention is called to the second card played to this trick by someone other than dummy, dummy can certainly call the director. When the director arrives, dummy can certainly give the facts to the declarer, including which card was led to the trick, which card the defender played first, and the precise sequence of events, including any comments or facial expressions or other physical mannerisms by any of the players.