Answer
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Work Step by Step
employee with ID 56789 recently switched to a new plan. If a query is made to both databases about the current health insurance plan for the employee with ID 56789, only database A would provide the correct information. In this scenario, understanding the limits of knowledge is crucial for accurate data retrieval.
Database A could conclude that the member is not present in its list, whereas Database B might not necessarily have the information to confirm or deny the member's presence on its list. This could be due to differences in the data stored or the criteria used for inclusion in each database.
