I think it's a true statement for me with the possible following exceptions:
- Guns - i know very little about guns and since many people hunt, maybe the average American knows more about firearms than i do
- Childbirth - Figuring than most women know more about childbirth than i do + all the fathers out there
- Christianity - Close call here. If you say "religion" i think i can pull it off, but if you start to get into Christianity in general, i might be exposed to the bible school teachings that i never received.