Hermitian raised an interesting but irrelevant argument about “pin cushioning” observed in a copy of a copy of the Long Form BC PDF, scanned in using a Fujitsu ScanSnap scanner. He is ‘worried’ that neither the LFBC PDF on the White House website, nor the PDF’s created on Xerox WorkCentres show such an optical illusion. Why this is relevant is beyond me but Kevin Vicklund encouraged Hermitian to place a ruler next to the image. I have done just that using GIMP (a totally free image processing solution).
Compare this to real distortions (pin cushioning). The lines no longer are parallel. One is an illusion, the other one a real optical distortion.
There are some excellent resources online to educate oneself