1, overview?
Sufficient conditions will certainly ensure the emergence of results.
2. definition?
Where there are things, there must be things; If there is no case A but not necessarily no case B, then A is a sufficient and unnecessary condition of B, which is called sufficient condition for short. Simply put, to satisfy A, it must be B; If A is not satisfied, it is not necessarily B, then A is a sufficient condition for B..
For example:
1, a rain; The ground is wet.
2. A handful of firewood; B will produce carbon dioxide.
In an example, a is a sufficient condition for b. To be exact, A is a necessary and sufficient condition for B;
First, A will inevitably lead to B;
Second, A is not a necessary condition for B to occur.
Second, the necessary conditions?
1, overview?
If there is no situation A, there must be no situation B; If there is something, there is not necessarily something, then A is the necessary and sufficient condition of B, referred to as the necessary condition.
2. definition?
Simply put, if you don't meet A, you won't meet B; Satisfying a does not necessarily mean b, then a is a necessary condition for B.
For example:
1. Keep breathing; B people can live
2.a knows 26 letters; B can read English.
3. One has heard of Peking Opera; B can appreciate the beauty of Beijing opera.
In the example, A is a necessary condition for B, to be exact, A is a necessary but not sufficient condition for B;
First, A is a necessary condition for B to occur;
Second, A does not necessarily lead to B.