I have a player character that got so good at bluffing as a child he doesn't realize he's doing it; as such, the player is wondering if this can let him avoid having to make Deception checks since he truly believes what he's saying.
Here's his backstory:
10 years ago, when Andrew was just a young lad, he went to a bar on not necessarily the best side of town for his kind. He was just a young street urchin who didn’ know anything. He got harassed by some older university students; they started asking him really hard questions. Then he was asked one question which stuck out: "What are your thoughts on the demise of the Georgian empire?" Eager to impress, Andrew gave an explanation using big words he didn’t understand; none of them understood the words either, but didn’t want to admit it, so they said, "Okay, cool." They then asked a much more difficult question, to which they got another response with a lot of difficult words. Still not wanting to admit they didn’t understand, they asked a much more difficult series of questions; they didn’t understand those insights. Little did they know Andrew didn’t understand either.
Many hours and drinks later, Andrew had finally earned their trust and friendship and was invited to sit in some classes with them, at which point he had become adept at giving nonsense answers that sounded realistic. A professor asked a really difficult question that no one could answer, then called on Andrew. Andrew gave the most bullshit answer ever, but the professor didn’t understand; not wanting to look a fool, the professor eventually hired Andrew as his apprentice, and through a series of events, Andrew later graduated with honors from that university.
And here's the request: He doesn't make Deception checks because he doesn't know that he's bluffing. Is this possible by the rules?
Does a character who believes what they're saying have to make Deception checks?