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.
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。关于这个话题，同城约会提供了深入分析
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Жители Санкт-Петербурга устроили «крысогон»17:52
The false positives at the bottom