User blog comment:Callofduty4/New CoD Fanfic Wiki/@comment-28584497-20100809145500

Fanon is fan-made canon. It is considered/treated by its propietary community as canon, although not officially recognized. Fanfiction can be fanon, but fanon is not always fanfiction, in that the creator of fanfiction may disclaim the events to be non-canon, in such situation where it contradicts canon. (As in, an alternate-timeline fanfiction.)