gordontd, on 2015-April-28, 01:09, said:
Well yes, but the question is how will it be "corrected" by the TD when it comes to light? What information will be assumed to be the correct information for the purpose of adjusting the score?
Unfortunately several posts have been made telling us how they think the players should explain their (dis)agreement at the table, but that isn't the question that was asked.
I think this is the wrong approach:
Trinidad, on 2015-April-27, 08:59, said:
You are supposed to tell what you know about your partner's bid. In this case, the partner of the Widget bidder "knows" that the Widget bid shows B (at least he thinks so). He doesn't know any better than that this is the agreement. So, he is supposed to explain: "That is the Widget convention, partner is showing B."
Now, the Widget bidder thinks that his partner has misexplained. At the appropriate time, the Widget bidder is supposed to call the TD and tell him: "We agreed to play Widget, but my partner got confused and he thought it showed B, but -quite obviously- it shows A."
I hope I'm not misunderstanding Trinidad's reply, but I can understand how some people might reach the conclusion that the director should rule as if the opponents asked about the bid, were given answer "B" by responder and that this was then corrected to "A" by the Widget bidder at the appropriate time. This would not happen if playing with screens, nor if playing online, and in any case the opponents aren't entitled to misexplanations by anyone, even if they might sometimes get them and be able to profit from them in encounters at the bridge table.
I still think that the opponents are entitled either to "no agreement", or possibly to "A" (based on the none-too-solid foundation of law 75C, rule MI rather than misbid unless there is evidence to the contrary).