Please open up for comments

As e-grasshopper rightfully says in a Skype-chat-message to me:

Hi Richard, please published on the AE DBE Blog information, that all of
students, should turn on the possibility of commenting posts by user who are not
blogger.com users (like me). Thx

That is, some blogging tools/services/hotels has "allow comments" disabled by default for anonymous or un-registered users. In your tool, find out how to enable commenting for various type of visitors on your blog. Typically you can also per post specify how you allow commenting.