Your gateway to endless inspiration
Look, if you suspect that someone has done a joke edit of an image, but you can't see the difference, don't sit there playing Where's Waldo; load the original image and the suspected edit up in separate tabs with identical zoom levels, and rapidly toggle back and forth between them. Don't even look for anything in particular – just flip them back and forth as fast as you can. Even single-pixel discrepancies will immediately become obvious. Make the human brain's fuckass pattern recognition work for you rather than against you!