Don’t you just love jigsaw puzzles? I don’t. I’ve only ever done them out of selflessness or spite.
But what if, instead of interlocking pieces in a two dimensional grid (if you’re lucky), each piece was smooth. Instead of aligning tabs and a picture (if you’re lucky), each piece is instead had a similar resonance to its neighbours. And what if, instead of a two dimensional puzzle, it’s one dimensional. There aren’t any corners, but on the other hand, it’s all edges.