Full disclosure

[barmar]

An interestingi real life case happened in the writeup of an appeals case from the recent USBC trials. Meckstroth says he based his defense on declarer having a minimum 12 HCP, and therefore played him to have a missing jack.

In fact, I was also thinking about that. And in that case, he apparently even asked dummy whether declarer opens light balanced hands, and was told that he rarely does (despite having done so twice so far in the session).