The following table illustrates the AND logic used in evaluating search conditions.
| x FALSE | x UNKNOWN | x TRUE | |
| y FALSE | FALSE | FALSE | FALSE |
| y UNKNOWN | FALSE | UNKNOWN | UNKNOWN |
| y TRUE | FALSE | UNKNOWN | TRUE |
The following table illustrates the AND logic used in evaluating search conditions.
| x FALSE | x UNKNOWN | x TRUE | |
| y FALSE | FALSE | FALSE | FALSE |
| y UNKNOWN | FALSE | UNKNOWN | UNKNOWN |
| y TRUE | FALSE | UNKNOWN | TRUE |