elementary logic like what is used in the clues by sam game does not take massive knowledge of other subjects at a high level yet only some colleges require it so even like a PhD can go through life without ever having had a course in it. Its maybe a bit easier to explain when they have been through things like algebra where math is a bit more abstracted. Still its easy enough to play the game with them and explain why a particular square must be a particular way. Its also good in that you can say you know I can’t figure out this one so lets get the clue and show that its an important thing but you know its not easy. So it is this wierd subject that is basic enough to engage with a child on it but advanced enough to never really master it. I guess in some ways that makes it like chess.