I was looking at the text of the CC BY-SA 4.0 license, which is the license used by posts on the SE network. Specifically, I noted the phrase that...
You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Some of the articles in the help center are editable by moderators, such as /help/on-topic on every site. However, when viewing the page, there is no indication that it has been edited, nor by whom, nor a link to the license. There is a revision history, but it's only visible to moderators and also doesn't clarify what license is being used.
For most posts, the current license is available at /posts/<ID>/timeline, but that page leads to a 404 for help center articles.
At the bottom of the page there's the standard "user contributions licensed under CC BY-SA", but nothing indicating that the help center falls under "user contributions", since most help center articles aren't user-contributed and presumarly do not fall under the CC BY-SA license.
Could the licensing of the help center articles please be clarified?