Logical sets consist of the saved results of a search query - either a basic or advanced search. Creating a logical set allows you to re-run the same query for the current set of results without having to recreate the query.
To create a logical set:
- Run either a basic or advanced search, then click on Save Query and add the set details
- Go to Manage Sets, click on Add Set then Logical, add the set details, and then run the query