You couldn't do it so it can't be done?
In science that's not definitive. It simply means that you couldn't do it.
So how do explain the other photos from that same session that clearly show the seal?
“You couldn’t do it so it can’t be done?”
Yup. Right up there with “I can’t imagine that so it can’t be true.”
Much of humanity’s confusion stems from overestimating the significance of “I.”
A seal can easily be “Photo-shopped” onto an image - especially when the file is saved within an editing program, as the Factcheck images were.
When the paper is flat there’s no way for the unaided eye to tell whether a “seal” was added digitally. It’s when the 3D aspect is shown that you have the potential for problems that would reveal a “Photoshop”. There are 2 images which claim to show the “seal” in visible 3D.
The one I told you about is problematic because the “seal” doesn’t distort with the fold - which is not reproducible in real life and strongly suggests that this seal did not exist on that paper in real life.
The other one is an image looking down the fold that has the “seal” on it. The problem with that one is that there is nothing on that document that identifies it as the same document that has Obama’s name on it. And in fact, there appears to be a line of print missing from what is on the Obama COLB. So at best it is unknown whether that is a photo of the Obama COLB and at worst it appears to definitely NOT be of Obama’s COLB.
So every 3D image showing the “seal” is either problematic or (at best) inconclusive. This is stuff that is on the Factcheck site itself and can be verified using only the naked eye. No computer or image processing at all. No reliance on documents whose provenance is unknown. Just basic observation.