Do you seriously think that because you say something that somehow makes it true?

I keep asking people on here to provide evidence for some improbable thing they have said, and getting a response wherein they simply repeat what they originally said, or reference a Youtube video, or worst of all, say "It is true and you can tell because I said it." What kind of incredulous bullshit is this?

Do you seriously think that because you say something that somehow makes it true?
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