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

When prime ministers gather in Brussels next week to try to sort it all out, David Cameron will be by no means the only one under pressure at home not to give an inch.

BBC: Poland's continuing claim on EU investment funds