I was taught that this could also mean an unspecified 2suiter, and not necessarily 23 points, but no one I know now agrees. options please!
Apologies: I'm new to this site today. Don't want to cause irritation. Is my old teaching illegal now please?
It's not a question of illegality so much as a modern trend towards opening one of a suit with strong two-suiters. This tends to make the subsequent auction (as long as there is one!) much easier.