IMPs against unknowns. You play 2/1 gf 5542 and 15-17 NT. After pass-pass you pick up 

. I think 1NT is obvious; but I had to pick up my toupé from the floor after the board, when my disgruntled partner (and spouse) in no uncertain terms let me know how inferior 1NT is. I cannot quote her since it would be against "house rules"; suffice it to say that Captain Haddock would blush from envy. BTW: We ended up going 1 down in 1NT, and 2♦ makes, so it wasn't a disaster. Afterwards I made "Mama" a bet: More than 75% on bridgewinners will do as I: bid 1NT. 

Forget about the last sentence; it will make the vote too biased, please give me your honest opnion.♦

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