User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-73.165.186.250-20201105000939/@comment-24258073-20201105235130

@ 73.165.186.250 - I've just checked the usergroup permissions on that wiki, and unregistered users have the (edit) permission there.

The (edit) permission and/or enabling article comments via Special:AdminDashboard is required to post article comments via the (articlecomments) permission.

Furthermore, I have checked the article pages on that wiki and I can post comments there while logged out. So there's no reason why you shouldn't be able to post comments there while logged out.