Given your history of lying and making outrageous claims yourself, I want to see some evidence. Give me a video timestamp or direct text quote of Grusch making those claims at the Congress briefing. I have seen zero reference to Grush making a claim about Aliens that are either extra-terrestrial or inter dimensional at the Congress briefing. I have read Grush statement and his claims have no reference to what you are referring to.
As for hearsay do you even know what that means. Clearly you don't despite the fact its been explained to you multiple times and you keep lying and saying Grusch is nothing more then hearsay. Need I remind you Grushs claims where substantiated and deemed credible and urgent meaning they are not hearsay. The Intelligence Community Inspector General looked into and confirmed Gruschs claims.
Do I have to remind you again that Gruschs job at the Unidentified Aerial Phenomena Task Force (UAPTF), specifically tasked him to uncover any illicit programs Special Access Programs (SAPs), an achievement he ultimately accomplished. Gruschs claims are not hearsay they are real backed up by evidence. I am talking about the real claims Grusch made not the fake claims you created.