Dividing line between private chat and personal message

[JimPas]

I think this would take us to 5 forms of communicating on Discourse… and 5 definitions:

1. personal message (a PM - which is core in Discourse)
   a) 1-on-1
   b) multiple users by invitation

2. private chat
   a) 1 on 1
   b) multiple users by invitation

3. group chat
   a) invitation only similar to a topic for groups but without the topic format
   b) members by invitation only

4. private topic (pretty much the same as a group topic?)

5. Public Topic (Everyone’s on! )