Comments weren't working. Turns out they were turned off. But no longer!

I somehow got the idea that to use the Disqus commenting system comments had to be turned off on Blogger. That makes sense, because surely Blogger comments should be disabled so that they are not competing with Disqus. Maybe the way Disqus or Blogger works changed at some point because the commenting feature has been missing for a quite a while. And yet, it was working just fine on my other blog, so I investigated. I went to the comments section of Blogger settings for both blogs and looked for any differences. Oh! Comments were turned off for new posts on the Vezquex Blog. I toggled this setting and then went back through the old posts to make sure each one allowed comments. It would have been easier if Blogger had a toggle box for comments on the Manage Posts page so that you could handle it all at once. But I don't post that much, so it didn't take too long.