Final answer:
To delete a knowledge base, typically a user would need to have a 'knowledge admin' or 'admin' role, as these roles have the necessary permissions for deletion.
Step-by-step explanation:
The minimum role needed to delete a knowledge base is typically the knowledge admin or admin.
Roles in a knowledge management system often follow a hierarchy where the admin role is at the top with the most permissions, including deletion rights. The exact role name and responsibilities may vary depending on the specific knowledge management system, but the admin role is generally the one with the authority to delete knowledge bases.