Simple question. Any of us would immediately recognize a Tic-Tac-Toe board and the Xs and Os, even just scratched into dirt on the ground or a dirty window. Is the game known globally? The earth is pretty flat these days, there can’t be too many places it’s never been seen before, and wikipedia says the game dates back at least to Ancient Egypt.
So is there anyplace left where this game is not known? Uncontacted tribes in the Amazon rainforest? I guess we have no way to find out if the Sentinlese play the game.