To comment on the blog, click “CONTINUE READING FULL POST” for the blog in question, scroll down to the bottom of it, below the “More Blogs” and “Related Links” sections, and there will be a comment box. Type your comment in there, and click the reply button below the box to publish.
Another method is to simply click the “reply” button in the upper-right corner of every blog. It appears in teal colored font between “FOLLOW” and “PERMALINK.”
New comments, including replies to yours, will show up in real time without the need to refresh your browser.