Yes, their claim can be easily falsified by a full investigation.

What is the answer if the result of said investigation is "well, we have no direct evidence"?

That has no bearing on if the claim is falsifiable or not.

> falsified by a full investigation

Unless it's a term I'm not aware of, a full investigation is still limited to human actors and limits.

The result of the investigation isn't a factor in determining if a claim is falsifiable or not, only the question if the investigation is possible. This is confusing falsifiable with falsified.

A full investigation by whom? They've broken no laws. Voluntary? Ha.

I realize what the parent was attempting to say, but internet rumormongering is poor form.

>A full investigation by whom?

The scientist seeking to determine if it is falsifiable. That no scientist has the resources necessary to do so now does not have bearing on determining if some claim is falsifiable or not.

I consider claims in which there is no realistic path to falsifiability non-falsifiable.