That is no tautology. Why can't there be things only discoverable by non-scientific means, or not discoverable at all?

这并不是同义反复的恒真命题，为什么不能有只能通过非科学方法发现的事物呢，又甚或有根本发现不了的事物？

youdao

This prevents the test from accidentally passing in all circumstances, making for a test that doesn't actually test anything (a tautology test).

这可以防止测试意外地通过所有情况，也就是说，测试实际上没有测试任何东西（同义反复 测试）。

youdao

What's important in My Fair Lady is to - repeat the repetitiousness of verse-- the rain in spain falls mainly on the plain -in terms of the tautology of the plot.

重要的是窈窕淑女中,这种韵律的加强-,“西班牙之雨大多洒落于平原之上“,韵律的反复加强了情节。

耶鲁公开课 - 文学理论导论课程节选

And the fear that since secrets are not revealed, that they're not willing to discuss - of course, that would be a tautology, but anyway -that in fact, in these cases, there's no way to know whether the government is simply covering up mistakes and embarrassments in some circumstances, or whether those concerns are real.

NPR: Invoking the State Secrets Privilege