Causality
A sufficient cause is a cause that says If I know A occurred, I can conclude that B also occurred. Example:  The center of a playing card is marked with a special symbol, called a large spade (♠). This is sufficient to say that the card is an ace.  There are three other cards in the game that are also aces. They are marked with a diamond (♦), a heart (♥), or a club (♣). It is not necessary to know that these three other cards exist or what they mean. On the other hand, there are no cards that are aces, except for those listed.