I found part of this in another thread, but no answer, and I don't think it's right.

Can anyone point to a specific line of text in the game or a live letter or interview or some official sources that states limit breaks are Dynamis-powered? Not something like 'Dynamis is emotional energy and Limit Breaks are when you get desperate/angry therefore...' because that's a bad connection, and also that not how limit breaks used to be described. They used to be 'synergy' powered, where a bunch of adventurers get together and the teamwork created limit attacks.

I can't find anything anywhere I look. Before I really buy into the idea, I'd like to see some actual reference.