indemonstrability

例句：

1. 1.The theory of relativity is indemonstrable by any means short of direct observation.
   相对论无法通过任何非直接观察的方式证明。
2. 2. The claim that the universe is expanding is an example of indemonstrability.
   宇宙膨胀的声明是难以证明的一个例子。
3. 3. The scientist's argument was so compelling that it was difficult to refute, demonstrating its indemonstrability.
   科学家的论点如此有说服力，以至于很难反驳，这证明了它的不可证明性。