[blml] Obviously this is the prime duty

[David Burn]

[DALB]

In the 2007 Laws, the wording "may not indicate in any manner that a mistake
has been made" no longer appears in Law 75; instead, a player "must do
nothing to correct the mistaken explanation while the auction continues".

[HdW]

I do not see any difference between the two.

[DALB]

None so blind as those who won't see...

Herman, when you "correct a mistaken explanation", you do so by saying "that
explanation is not correct; it should be so-and-so". When you "indicate in
any manner that a mistake has been made", you are not correcting the
explanation, merely indicating that it is wrong.

I have said, and you have agreed, that in this position:

North      South
1NT (1)    2H (2)
?

(1) systemically strong, but explained as weak
(2) transfer over a strong no trump, natural over a weak no trump

North must bid 2S because even though this violates the current L75D2 (it is
an indication in some manner that South has made a mistake), he is
nevertheless bound by the stronger provisions of L16 (it is UI to him that
his partner has hearts, and he must not act thereon).

Now, to bid 2S is "an indication [in some manner] that a mistake has been
made". It is not, however, a "correction of the explanation". That is the
"difference between the two", and the fact that L75 has been amended in the
2007 version to allow players to act legally per the MS but illegally per
the dWS is as strong an indication as there could be that their intent was
as advocated by the MS and not as advocated by the dWS.

David Burn
London, England