1♥ - 2NT(A) - 1♠
The dealer said "that's not sufficient" and his partner said "sorry" and replaced it with 2♠.
"That's not sufficient either" said dealer, and she finally managed to make a legal call: 3♠.
I knew there was a law about replacing an insufficient bid with another insufficient bid, and I found law 27B4:
Quote
"As in 3" is referring to:
Quote
"Except as provided in B1(b)" refers to this:
Quote
And "except as in (a)" refers to:
Quote
The bid was not (initially) replaced by the lowest legal bid specifying the same denomination, so 27B1(a) doesn't apply. What about 27B1(b)? Was 2♠ a comparable call? There's nothing in law 23 to say that a comparable call has to be sufficient, although I imagine that was the intention of the lawmakers. I suspect I was supposed to ask offender's LHO whether they want to accept 1♠ (explaining the consequences if they don't), then whether they want to accept 2♠ (ditto consequences), then finally, if neither call is accepted, rule that 3♠ stands as the call at that turn and silence offender's partner for the rest of the auction, as if it had been replaced by an illegal double or redouble.
Is that how you read the law?
(If it makes any difference, I did check that a cue-bid would not be the lowest legal call in the same denomination.)