Sufficient condition

An event A is said to be a sufficient condition for event B whenever the occurrence of A is all that is required for the occurrence of B.

A sufficient condition is a condition that, if true, proves that another fact is true. For example:
 * "Breathing is a sufficient condition of living." If you are breathing, then you are definitely alive."
 * "Having polio is a sufficient condition of being infected with poliovirus." If you have polio, then you have definitely been infected with polio virus.

The other type of condition is a necessary condition.