Boolean Logic Primer

Boolean Logic Primer

OR broadens the results AND narrows the results NOT narrows the results

contain at least one item)* contain all items) (results must contain A & B but no C's)

A or B or C A and B and C (A and B) not C hurricane or surge or damage hurricane and surge and damage (hurricane and surge) not damage

* An "OR" search would look for "hurricane" or "surge" or "damage" or any combination of the three words. In the illustration above, the results indicate every possible result except the combination of all three words.