I am going through the ACBL book, Bidding in the 21st Century, and I am puzzled by a suggested response. Let's say I have 6-9 total points and partner opens a major suit, but I don't have support for the opening bid, and I don't have a new 4-card suit to bid at the 1-level. The book suggests bidding 1NT, and the examples show bidding it without stoppers in the other suits. Given the same situation, but an opening bid in a minor suit by partner, the book recommends a 1NT response only with stoppers. What puzzles me is the suggestion to bid 1NT without stoppers in response to a major suit. My understanding is that a 1NT bid is not forcing (as a new suit would be), so it seems to me that I could get left in a 1NT contract without stoppers. So, my question boils down to: Am I reading correctly that I should bid 1NT in response to a major suit opening bid, even without stoppers, as described above? Thanks for your help.