Vampyr, on 2014-November-29, 20:48, said:
It looks as if the attempt to take advantage of the UI was the player's chief reason for choosing his call. Adjust, maybe give a PP, next case.
Where I disagree with you is on the interpretation of Law 73 which concludes, "must carefully avoid taking any advantage from that unauthorised information",
TD: What did the UI suggest to you?
Chancer: I thought that South was either weak or strong for his invite. I decided to play him for being weak and hoped that 3NT might, for some reason, fail.
TD: Did you take any advantage from that unauthorised information?
Chancer: No, even opposite a minimum invite, it must still be right to bid 3NT, and Pass must be hugely against the odds. But I saw an opportunity to score a goal against SB and took a shot from 60 yards. The cause of the damage was not my selecting Pass, which increased the a priori expectancy of EW, hence no damage, but the freakish layout of the cards. In 1000 simulations opposite a 19-count, 3NT did not fail a single time.
In my opinion, for a call to be demonstrably suggested, it must be more likely to succeed as a result of the UI, and have positive expectancy.