For SAT problems with 10 variables and 200 clauses, sometimes outputted UNSAT because it couldn't find any satisfying assignment, and it would take a lot more time to find one, which is logically sound. I don't consider this as bad reasoning as it is about performance. So I tried it with only 100 clauses and it successfully found valid assignments.
围炉之“炉”，从前是炭火炉，如今是电磁炉。不变的是在氤氲的热气里，一家人坐着塑料凳，在木桌前簇拥着，必须起身才够得到对角线的菜。夹肉的筷子频频打架，火锅沸腾到锅盖跳舞了才手忙脚乱地关掉，身后的电视机明明开了很大声音，却总是什么也听不清。
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Carnyces fascinated the Romans, who frequently depicted them as war trophies.，推荐阅读safew官方版本下载获取更多信息
The developers are well aware that both projects may still be unfinished 10 years from now, but most are just working toward the next release.，这一点在safew官方下载中也有详细论述