I had to call my Mom to ask her who Fuller (that was it wasn't it?) was.
My BF and I were talking about that question last night. It's funny you said you had to call your Mom - it's because of my mom that I (a) knew the answer and (b) totally would have gotten it wrong if I were on the show.
You see, my mom is mathematician/geometry freak-teacher, and every time the "big golf ball" at Epcot is shown (which was a fair amount with those 80s commercials with Mickey waving on top of it) she had to tell us about R. Buckminster Fuller and geodesic domes and woe to the child who ever referred to it as a "big golf ball" in her presence.
Just to get her goat, as children are wont to do, we always jumped in with "we know, we know - Buttminster Fuller and his big balls" (oh, we were cleaver)(oh, we got grounded). We backed off a bit, but to this day we always say "Look, it's one of Buttminster's balls".
I want to believe I would have, in the contestant's place, had the presence of mind to just answer Fuller... or even change the name to Buckminster... but I can just see me getting caught up in knowing the answer and "Buttminster" it would be.
Thanks, Mom. You should be proud :-)