barmar, on 2017-August-22, 15:13, said:
How can you say "notwithstanding the CC"? If you can't believe the CC, what form of "evidence to the contrary" would you consider persuasive? It seems like you're essentially saying to ignore the qualifier "in the absense of evidence to the contrary", since you don't believe the evidence, either.
It may be true that the pair frequently misexplains, but this doesn't seem to be one of those instances. Is there some reason to believe that the pair also has a general problem filling out their CC?
In Dutch we have the expression "Paper is patient". I've seen CC's with a textbook collection of conventions, but many of these were hardly ever used by the pair involved. A classic is 3NT Unusual, which the average club player sees maybe once every three or four years. This summer I had a perfect one: x-Qxx-AKQJTxxx-x, but unfortunately my RHO opened with 1
♠.
In this case the OP gives a clear indication that the players have an agreement on their CC, which neither of them seems to know. S bids 3
♦ with a hand that is not 'weak', not in my book anyway, but intermediate, which is a deviation of the CC. And N, when asked, looks 'blank' and only when prompted, answers 'Yes' to the question 'weak?' That should be enough evidence that what is on the CC is not what they actually play; neither of them seems to know what the agreement is, so there is no agreement.
I think, that if you direct on the basis of a piece of paper handed to you by the players and not much more, you can't establish what their agreements actually are and whether they know and use these.