subtypeThere’s a proof assistant called Isabelle; the most used part is Isabelle/HOL (which stands for High Order Logic) but there’s also Isabelle/FOL (First Order Logic), and apparently there are also people named “Isabelle Fol”, which makes searching a bit complicated :blobcatnotlikethis:
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.