Re: There's several issues with sitting judges today
That's exactly it. There is something called "judicial knowledge" which is a (very) short things that can be accepted without definition. Back in the 1960s a judge got ridiculed by the press for asking counsel "Who are 'The Beatles'*?" after an undefined reference. The judge wasn't personally unaware of the group, but he needed the reference defining for the court reports.
* or maybe the Rolling Stones - I can't remember exactly.