Quote Originally Posted by Duo Sonata View Post
Exactly...

Technically the Justicar for a terminator squad is upgraded to a Justicar Thawn so alittle RAI would be needed in this case since clearly Thawn is a Justicar in his fluff and this codex uses fluff as a basis for some of its rules...also there is no 'Justicar' rule in either units profile so one would have to go with the model's profile name which both have the word justicar, otherwise even the Terminator Justicar wouldn't count as a units Justicar since it's not a Justicar it's a Terminator Justicar.

As for the case of units with no justicar/knight of flame, it's best just not to think too much on wordings like that, Just try to use common sense and overlook it, Book wasn't exactly written as well or clear as it should have so trying to go with scrictly RAW is something of a dead end.
Fair.