What setting allows users to view a Knowledge Base article even if they are not logged in?

The ESS (Employee Self-Service) role is a standard user role and still requires the user to be logged in.

There is no standard 'Allow All' role or setting in ServiceNow specifically for public unauthenticated access.

The 'Public' setting on a Knowledge Base or a specific article, typically controlled by the 'glide.knowman.public_access' property or a specific 'kb_knowledge_base' record setting, enables access for users who are not logged into the ServiceNow instance.

'View All' is not a standard ServiceNow setting or role that grants unauthenticated public access to Knowledge Base articles.