Today’s puzzle is a new twist on a classic genre: the “common knowledge” hat riddle in which logicians deduce facts about their hats based on what they know, and what they know others know.
// Check for BYOB request FIRST。关于这个话题，雷电模拟器官方版本下载提供了深入分析
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Author(s): Cai-Fu Pan, Dong-Jie Wang, Wen-Lue Mao, Li-Xia Jia, Yan-Kun Dou, Jin-Li Cao, Xin-Fu He, Wen Yang，更多细节参见旺商聊官方下载
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