He made a lot of specific statements that are either true or false—and are easily verifiable and/or falsifiable.
Verification of hearsay will be hard.
I only saw parts of his testimony. Can you give me an example of a claim that would be easily verifiable and/or falsifiable?
Sure:
—Defense contractors (that he will name in private session) will have alien craft artifacts or they will not.
—The IG will be able to show the alleged misappropriation of federal funds to cover the ongoing costs to reverse engineer/store/hide/coverup alien craft or they will not.
—Other whistleblowers will come forward to testify to the Committee or they will not....
and those are just a few examples—we are talking double digits of verifiable/falsifiable stuff here.