leebca, on 2014-August-05, 12:11, said:
Neither opener nor responder "should have the option of setting the contract at 3♠". It is an integral part of Jacoby 2NT that you are in a game-forcing auction. If responder is not strong enough to force to game opposite a minimum opener (however the partnership defines that minimum), then responder should make a limit raise, not bid Jacoby 2NT.