Please don't be embarrassed that the word is flighty or uninterested in things with thousands of years of history that still exist today.
I am thrilled that you asked. I hope the lesson was that maybe your dad knows something and he would never try to embarrass you on purpose, either by showing you-up knowing more than you do, or running his mouth about something that isn't true.
Your dads not gonna be perfect on a lot of things,. Neither of you will be perfect on anything.. neither of you know everything. try to be nice to each other
