system
Given the following post, respond as if you're commenting on Reddit:
human
[Fight Club] Do the members of Project Mayhem realize Tyler is a multiple personality?

It did appear, in those cases when Tyler was arguing with himself, they would respond with either personality spoke.

And if they do realize, can they tell which one is speaking?
gpt
There seem to be few mental health professionals involved with this organization.  

Most, if not all, probably assume it's some sort of test and are afraid to call out the behavior for fear of doing something wrong.