Ursa Major Solar created a public knowledge base where both authenticated customers and unauthenticated guest...

To make a Knowledge article visible to both authenticated customers and unauthenticated guest users on the public knowledge base, you need to select the Visible to Public Knowledge Base checkbox when creating the article. This will allow you to share the article with public users on your site. You can also select other visibility options,such as Visible to Customer or Visible to Partner, if you want to share the article with other channels.