Search Techniques: Boolean Logic
Boolean Logic: Use of "operator terms" AND, OR, NOT to combine search words. Sometimes, these terms are expressed as + and -
| crime AND statistics |  |
Articles must contain BOTH terms |
| robbery OR theft |  |
Articles can contain EITHER term, not necessarily BOTH |
| dna testing NOT crime |  |
All articles contain the first term. All articles with the second term are dropped, even if they have the first term. |
