Posted 2009-October-15, 04:02
You would get more expert comment if you posted this in the Simple Rulings branch of forum, near the bottom of the page.
The only law of interest is misinformation. In such cases we can also look for abuse of unauthorised information, or fielded misbid, but neither appear relevant.
The ruling looks odd. The TD ruled that differently informed S would not double. This is far from obvious, and we are not even told that S made representations to this effect, or that the TD enquired how NS might have bid if differently informed.
Since W is a beginner, it seems likely that EW have not made any explicit agreement as to the strength of 3D. South's question was not in proper form, offering W a choice of two options neither of which might in fact be a correct explanation, and appears likely to confuse a weak player. If south had called the director on receiving an unsatisfactory answer, W could have been sent away from the table and E given the actual agreement, if any. On balance, the absence of explanation that S got seems reasonable, given his unfair question. E's bid was most likely a misjudgment rather than in accordance with an undisclosed agreement.
North, who heard the same absence-of-explanation as South, thought South's double was for take-out, when South probably wanted it to be for penalties. It looks to me that NS had their own misunderstanding, and being subsequent to E's misjudged bid, the table score was the score NS deserved. No adjustment.