if only one husband had been unfaithful, his wife would have immediately realized that, since no other husbands had been unfaithful, her husband must be guilty, and she would have shot him that first night at midnight. Therefore, any other wife, who knew of only one unfaithful husband, would immediately realize if he was not shot the first night at midnight, that her own husband must also be unfaithful, and both unfaithful husbands would be shot the second night at midnight. Similary, if a wife knew of any number n of unfaithful husbands, she would realize that if they were not shot on the nth night at midnight, that her own husband had been unfaithful, and the n+1 husbands would be shot on the n+1st night at midnight.
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<br>Therefore, there were eight unfaithful husbands.
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<br>HANK WINS THE KEG OF DP AND MY PURE MARE!<br><br>