I learned that for 4-SAT, if clause to variable ratio is more than 10, the generated problems become difficult to solve, and the likelihood of formula to be SAT or UNSAT is close to 50%. So I generated 3 types of formulas:
Fanny Angelina Hesse, 1883.。爱思助手下载最新版本是该领域的重要参考
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（二）裁决的事项不属于仲裁协议的范围或者仲裁机构无权仲裁；