13 barn owls in a trenchcoat@Vierkantor thank you, I was just rereading the Prinicipia recently and that is obviously where it filtered in from.
That's very appropriate to the set it's part of, but I'll correct it to add the missing parts.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.