Still, offering no support for your idea, I see.
Ditto.
My argument: We have no evidence what M'Ress is. Why? Because there is no evidence in TAS.
Your argument: M'Press is clearly an alien. Why? Because I think so.[/QUOTE]
You quoted a novel to support your argument. If expanded universe material is accepted in this discussion (which you established by referring to Spock's World to support your argument), then M'Ress' biography (published by Lincoln Enterprises that names her as a Caitian from the planet Cait is valid as well.