Statements that Ms. Lewinsky makes to other people are not viewed as independent corroborative evidence.

CNN

Nor, as a rule, is there any corroborative evidence, since abuse tends to take place in private.

ECONOMIST: Sex-abuse cases

The corroborative evidence that the prosecutor would have to have there, which is required in a perjury case.

CNN

And no court and no prosecutor would accept the notion that such statements standing alone satisfy the requirement of substantial corroborative proof when there is a swearing bash.

CNN

First, this is a classic oath on oath, he-says-she-says swearing match, that under ordinary custom and practice at the Department of Justice never would be prosecuted without substantial corroborative proof.

CNN