It's ok to say "I don't know".
My mom was an elmentary school teacher's aid in the county just east of Jefferson County (Louisville). One day in the early 1990s Ali came out to do an assembly at her school for some reason (don't remember why now) and some precocious older kid, maybe 9 or 10 years old, came up to Ali and put up his dukes like he was going to fight Ali. Ali broke down into his legendary boxing stance, starting dancing (as best he could with his health at the time) and throwing a few jabs at the air around the kid. The kid's eyes got as big as golf balls, he turned around and ran away from Ali. Ali and everyone else laughed. The local news got it on tape. Pretty funny stuff.