You should bring a Motion for Summary Judgement when you have a Overwhelming amount of factual evidence that just by seeing the facts the Judge can clearly see your the Winner. 💫
You talked about the judge asking questions about facts not on the record and that he can't establish a fact not on record but rule 201b allows the court to move on its own to recognize adjudication facts that are not reasonable in dispute.
That seems to be a particular state rule, I think Georgia in this instance, but most state rules are based on the federal rules of the same subject. Either way, state rules can not supercede federal law anyway when it comes to protections. Try searching for federal summary judgment law to get the basics of the subject.