My 2N bid is described as "invitational to 3N game" and 15-17HCP, but bidding 3N instead would be described as 16-21HCP. Since responder is 11+ total points, wouldn't 2N be invitational to 3N show a balanced minimum opener, with opp's suit stopped?
North's 3♦ feels like it's declining the invitation to game, but the description is still unlimited (11+). Should it be different?

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