Even so, there are some games whose popularity is so great that everybody knows how to play them.
Rules may also vary from one group of people to the other and you could also have the surprise of not finding two people who know the same rules for a simple game. Some games are known all over the world which are obviously the most popular card games, while others are known to smaller communities. If you ask people from all over the world whether they know how to play any card game, you will find that everybody knows how to play at least something.
