Common sense.
Otherwise, what is a race?
Is it just a thing that has lots of fluff but no 'base' stat block?
- No, because you would be stuck with human and... human.
- Others don't have a separate fluff section, but are considered a race. Example, goblins and kenku.
Is a race just any monster?
- That's a broad term that includes races (playable creatures) and unplayable creatures.
Why I think that templated creatures are a different race that an untemplated race of the same type.
- They are affected by different abilities and have access to different racial feats and racial prestige classes. Example, lycanthropy.