SAT (short for "satisfiability") is a logic problem that given a boolean formula, it asks whether the boolean formula has an assignment that makes the problem true. An example boolean formula is:
立足当前和长远，防止返贫致贫和乡村全面振兴，一体谋划、一体推进。。同城约会对此有专业解读
В России ответили на имитирующие высадку на Украине учения НАТО18:04，推荐阅读WPS官方版本下载获取更多信息
That narrowed Lucy's possible address down further - but they didn't want to go door to door, making enquiries. Get the address wrong, and they could risk the suspect being tipped off that he was on the authorities' radar.
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