结论是“宿命”，即不可逆转性。
可逆转性是正确行为(甚至睡眠)的一个特点。
Reversibility is a feature of all correct action, even sleep.
不管是从物理还是心理角度看，用可逆转性来测试人类行为都是可行的。
The test of reversibility holds good for all human activity whether it is viewed from the physical or the emotional standpoint.
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