Alright, don't get alarmed but my dad has just said he's never heard of rock, paper, scissors. Never. Heard. Of. It.

He just saw someone playing it on tv and asked what it was. Never played it, seen it, heard reference to it even in a film. Ever in his life

Not merely the name, the concept. Brand new to him. I demonstrated the game for him. Neither recognised it nor understood its rules.

haha! That's great.