Yeah, I don’t care how much “internet” research DG did, if you haven’t seen a piece of wreckage (or talked to someone who has), interviewed a witness, all you’re doing is speculating and that’s not a “Probable” Cause, that’s a “Possible”, “Maybe”, “Sorta Kinda” Cause. He rarely leaves the door open for any other possibility.
My problem is he co-opted the term that is “widely” accepted as the official reason for the accident.