For UNSAT problems with 10 variables and 200 clauses, it always claimed that the formula is SAT and made up assignments (See this example).
国家鼓励和支持企业积极有序参与国际市场开发，推动符合国家有关规定的核电、核燃料相关设备和技术服务出口。
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"Everyone has been dreaming for 40 years of one robot hand to rule the world. A lot of people think it could be the humanoid hand," says Pierce.