“不同寻常的观点需要不同寻常的证据”或“非凡的观点需要非凡的证据”的出处：

"Extraordinary claims require extraordinary evidence" was a phrase made popular by Carl Sagan. Its roots are much older, however, with the French mathematician Laplace stating that: "The weight of evidence for an extraordinary claim must be proportioned to its strangeness."

见：

Extraordinary claims require extraordinary evidence ...

rationalwiki.org/wiki/Extraordinary_claims_require_extraordinary_evidence

还有人从哲学上探讨“不同寻常的观点需要不同寻常的证据”的合理性：

Do Extraordinary Claims Require Extraordinary Evidence?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6099700/