I say sworn testimony that is highly believable is evidence to me.
And no, he may never have been on the island. Virginia only testified that Dershowitz had intercourse with her at least 5 times, in various places in NY and maybe Connecticut, in New Mexico, and on the plane.
Im a little biased. See my 48.
There is no evidence that Dershowitz was ever on Epstein's Island.
The woman testified that she was on Epstein's island and Epstein had sex with her.
Where did she allegedly have sex with Dershowitz?