User blog comment:KthulhuHimself/Norminals/@comment-26428969-20151030175009

"First define a language "N(0)". This will serve as our base language, and is somewhat (very) similar to FOST. It contains all the terms, sets, arguments, classes, etc. used in FOST."

"classes [...] used in FOST"

classes? in FOST? come on... I hope its just a mistake :/