Vampyr, on 2014-March-24, 20:23, said:
I think that this is the intention of the WBFLC, and it is uncharctaristically sensible. I also do not agree with Jeffrey's assertion that "damage" to the opponents occurs when a truly inadvertent call is corrected to the one the player was trying to grab when his fingers missed. The WBFLC have tried, in the latest version of the Laws, to create an environment in which an ordinary hand of bridge can be played after an irregularity. Mostly they have failed miserably, but not this time.
Laws that allow the rectification of mechanical errors add unnecessary complexity. They also over-depend on the honesty and self-awareness of players and the mind-reading skills of directors. In my experience, most of opponents' "mechanical errors" appear to have been slips of the mind, but directors don't rule that way. Law-abiding, truthful players with insight into their motives, who are unwilling to rationalize, inevitably suffer disadvantage. It's hard to understand why rule-makers and directors seem so keen to abandon common-sense "fairness" in favour of rule-maker's so-called "equity".
OK, back to the topic. At Brighton, a few years ago, there was a similar case, involving an auction something like this
1N "12-14" (Pass) 2
♦ "Hearts" (Pass)
2
♥ (All pass)
At the end of play, declarer volunteered that he intended to open 1
♠ and believed he had done so, until his partner woke him up with the range announcement. Without the announcement, declarer might not have recognised 2
♦ as a transfer. The case was reported and discussed here. In this case, the irregularity (if there was one) was discovered only because declarer drew attention to his mistake.