Given that the source is "ONE" person is irrelevant.
Looking at your comment history, I find your judgment to be suspect.
Smear campaigns exist for a lot of people, in a variety of fields, for a variety of reasons. Individuals running for government office seem to always have smear campaigns run against them. I don't really read much into that, I'm curious why that is "strong meta evidence" to you.
As many people focus to lend credence to his story as try to discredit him. Again, run-of-the-mill behavior for something like this. As you can see on sites like this, he has a lot of support.
Someone lied under oath about things that are at best tangential to this story, if they relate at all.
We don't have any real, actual evidence at all, other than the artifacts generated by one guy.
This comment proves you're either completely delusional, uninformed, shilling or all of the above.
First; "Someone" == https://en.wikipedia.org/wiki/James_R._Clapper
He is the CURRENT HEAD of National Intelligence, directing a PUBLISHED budget of ~$50 BILLION dollars.
The things he lied about are the CORE of this story, not "tangential" -- He specifically stated that the NSA collects "nothing" on US citizens, NOTHING.
Given this statement by you, it is clear you're completely deluded.
So why is your beef with the NSA/The intelligence gathering effort?
Why do you claim that the evidence is all provided by "ONE person"?
I don't think that is really anything to hang a hat on.