hydrospanner said:
Who said he had completed his training while he was stationed there? And where was it established that he is the First Order equivalent of the Green Beret?

I’m not sure why I’m going to attempt to apply logic to this screwball story line, but let’s try anyway.

So by your thinking, Finn was a baby, learned his ABCs from his First Order teachers, grew into a teen, and then studied the textbook, “The Art of Stormtrooping, First Order Style,” and then graduated stormtrooper high school and then put a droid out of a job on Starkiller Central buy becoming the garbage man. Then, he evidently took out the garbage so well, Captain Fantasma noticed him and selected him for her elite of the elite elite squad.

Uh huh.