Indeed.
But if you wrote information gathered from an interview with an eyewitness you’d be a detective or investigative journalist, right?
And if you saw it yourself and worked with a co-author, you’d be an eyewitness with a co-author.
And if you interviewed several people who saw it, you would be corroborating the original story.
And if you were really confident, you might even write that 500 others were witnesses to the event.
And if you provided all of that, I might be inclined to put aside my preconceived notions and consider whether the event was possible. It might at least make me approach it with an open mind to seek the truth, even if it sounds unbelievable. To ignore such a mountain of eyewitness testimony would be foolish or stubborn on my part…