Ah, I see. Ya, I often reach for metaphors like this: https://storage.needpix.com/rsynced_images/perspective-3785866_1280.jpg https://storage.needpix.com/rsync

Ah, I see. Ya, I often reach for metaphors like this: https://storage.needpix.com/rsynced_images/perspective-3785866_1280.jpg https://storage.needpix.com/rsynced_images/perspective-37858... Basically, staring at one of the shadows on the wall and declaring confidently that you know what the shape of the solid is that produced it.