To add to this, I've noticed a lot of the material that gets declassified, that is purported to be evidence of aliens/psychics/magic/etc, is in the form of field notes or case studies that either contain full quotations or summaries of what someone else claims is true, but are not actually experiments or demonstrations of what is claimed.
For example, you might have a declassified CIA document that's being distributed as evidence of psychic phenomenon, but upon further inspection, you'll find isn't the case. What you instead see is documentation along the lines of "someone made a claim about X, here's what they say about X" where X can be "I can read minds" or whatever. At no point is there an actual scientific test of this, the document is just acknowledgment that someone said some outlandish things to government investigators. Then years later those notes are declassified and somehow become evidence that X really happened.
It's like reading a police report about someone who took too much methamphetamine and ran around claiming that they could fly, and then using that police report as evidence that the government knows people can fly.