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Introduction
to Boolean Logic (continued)
NOT:
- Retrieves a set from which citations to articles containing specified search terms following the NOT operator are eliminated.
Example: arthritis NOT letter
Note in the diagram to the right and in the sample search results below that the retrieval is a portion of the total retrieval for arthritis – that portion not including the term letter.
Search terms |
Results |
arthritis |
167,933 |
letter |
617,646 |
arthritis NOT letter |
159,681 |
- Use the NOT operator with caution; you might eliminate relevant articles.
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Last reviewed: 28 April 2009
Last updated: 10 October 2008
First published: 20 March 2001
Metadata| Permanence level: Permanent: Dynamic Content