1. These hypotheses, I contend, must be refutable in principle. 我认为这些假说在原则上必须是可以反驳的。
2. Historically, they fail to see that private land ownership is refutable and that collective land ownership can work well. 在历史层面，他们没有看到土地私有制度是可以证伪的，没有看到土地集体所有也可以发展得很好。
3. The structure and proving process of Gorgias three propositions were analyzed and refuted and conclusion was made that his propositions were refutable. 通过对其三个命题的论证及其结论的分析和反驳表明，高尔吉亚的三个命题不论在其论证上，还是在其结论上都是有困难的，是可以反驳的。
