What a world these contrarians live in where no fact can ever proven if they don't want it to be true. Absent a time machine, there would be no way to prove a single fact in human history using their methods. For example, prove that Lincoln delivered the Gettysburg Address. There is only one fuzzy picture and you arguably can't identify him. I bet you could find a witness who quibbled with what time it began and ended or the color of Lincoln's coat. No one likely had their watch calibrated by some unspecified precise mechanism to Greenwich Mean Time. Letters and accounts COULD be the product of fakery. Eyewitnesses are unreliable etc. It is hilarious. I can't believe they are for real, but view this as a hobby to see how long they can prolong a discussion without having to concede the obvious. Round and round it goes down the rabbit hole.