Explain Boolean operators and give an example of a search using AND, OR, and NOT.

• A. Boolean operators replace keywords with synonyms.
• B. Boolean operators connect terms to refine searches: AND (narrows), OR (expands), NOT (excludes). Example: 'climate change AND policy OR regulation NOT politics'.
• C. Boolean operators only apply to databases with advanced search.
• D. Boolean operators do the opposite of what we need.

Answer: (B)

Boolean operators connect search terms to control how results are returned. They let you decide how the terms relate to one another, so you can be precise about what you want to find.

And narrows the results because both terms must appear. So climate change AND policy pulls up items that discuss both topics together.

Or expands the results by allowing either term to appear. Climate change OR policy returns sources about climate change, about policy, or about both.

Not excludes items that contain the word after NOT. So NOT politics removes results that mention politics from the set you’re retrieving.

Using an example like climate change AND policy OR regulation NOT politics shows all the relevant possibilities: results that discuss climate change and policy, or results about regulation, while filtering out anything mentioning politics. If your search tool supports grouping with parentheses, you can make the intent even clearer, for instance: (climate change AND policy) OR (regulation NOT politics). These operators aren’t about replacing keywords; they’re about building a precise, filterable search.