Earlier quoted context omitted.
Note that the denial is couched in the terminology "there was no legal wrongdoing". Not that there was no wrongdoing, just nothing blatant enough (or which left evidence) that it broke laws.
No, the denial says "no evidence exists to support the claim". That's a direct and testable assertion, not weasel words.
Criminal and civil investigations are not scientific investigations. They may make use of science, but they are not scientific. To import the language of science--actually neo-Popperian pop-cultural language about science--into a discussion of an internal investigation into harassment claims is highly suspect.
Your claim aside, these are weasel words. The way to discover the fact that they are is to appropriately apply language akin to that of jurisprudence, rather than inappropriately apply that of science.