I have a friend who edits over at Life. It is no longer a printed magazine like it used to be, but it still has a strong web presence. While looking through the images, I spotted this page:
It’s fun trying to pick out the real images from the fake ones. It can be hard on some of them. I maybe got 60% to 70% correct. There were several that threw me. It just goes to show you how hard it is to tell a “real” photo from a “fake” one.