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Must not be refutable by fact .

一定不可以给事实推翻。

These hypotheses , I contend , must refutable in principle .

我认为这些假说在原则上必须是可以反驳的.

To understand the logical nature of a testable ( refutable ) hypothesis .

了解可验证(可驳斥)假说的逻辑性。

To understand the importance of the postulate of maximization in deriving testable ( refutable ) implications .

了解极大化的假设对推论出可验证(可驳斥)含义的重要性。

Development is an absolute principle and I ( omitted ) refutable fact also .

发展才是硬道理,这是不争的事实.