Final answer:
The minimum role required to edit a Knowledge article in the HR General Knowledge base without set user criteria is likely the HR Basic role, provided it's configured with editing permissions.
Step-by-step explanation:
If a Knowledge article in the Human Resources General Knowledge base has no Can Contribute User Criteria set, the minimum role a user would need to edit the article is generally the KB Writer role, which in the context of ServiceNow Human Resources is HR Basic [sn_hr_core.basic]. However, in some implementations, this could be configured differently based on organization-specific needs and custom role assignment. For standard out-of-the-box configurations, HR Basic would usually have the permissions necessary to contribute to the knowledge base. Other roles, such as HR Admin, would inherently have these permissions as well, but it is excessive to require this level of access just for editing knowledge articles. The KB Reader role is typically assigned for view-only permissions and would not be sufficient to edit articles. The KB Writer role often has the necessary permissions to create and edit articles within the Knowledge base, but this specific role name is not mentioned in the provided list of roles; thus, we work with the assumption that HR Basic has been given those capabilities.