I am well aware you could tell him that, but there is no solid definition of a warrior in Skyrim so that statement would essentially be meaningless. Perhaps "warrior" has a fairly obvious definition, but what about more complex classes?
You're not making any sense. Of course there is a solid definition of a Warrior. Classes aren't defined by their meta-game stats, they are defined by the cultural realities of that universe. I'm sure Skyrim inhabitants don't have to carry around a character sheet and show it to their friends everytime they're asked what they do for a living. They simply answer the question.
Besides, if there is no definition of a warrior in Skyrim, then how exactly would the class name make a difference? You're being silly. And yes, we do have job titles IRL, but were not just doing a nine-to-five job in Skyrim, we're playing a role. And when you call yourself Doctor of Physics, it's not just a name you've picked from a list. You've actually done several years of education and work in specific areas.
What exactly makes you a warrior? What are you actually doing that makes you more of a warrior than a thief or a mage? You're saying that a class name describes you in any way - it doesn't. It's a word that by itself is meaningless. Only when you defined
what a warrior is, does it become meaningful. You still need to answer what you're actually doing.
Classes are meta-game, they got nothing to do with roleplaying. You're mixing up words.