Caitlynne, on 2016-May-19, 07:24, said:
Once you start with 2NT there are other options available here, such as following up with 4♦ or 4NT. 2NT followed by 4♦ presumably has to be non-forcing but whether that hand really exists I am not sure. 2NT followed by 4NT has to be different somehow from an immediate 4NT, as well as from 3♣->4♦ and 3♦->5♣. Presumably either the slow route establishes a forcing pass or one shows a mild preference for one minor and the other a mild preference for the other. In any case, 3♦ followed by 5♣ surely has to show longer diamonds so thankfully these gradations are moot.
fromageGB, on 2016-May-19, 07:38, said:
Stop, step away from the coffee pot and find a nice quiet corner to lie down in. You have spent too much time listening to people like Ken and me, fromage!