Mom, I keep telling you that you need to read the sequences. Many of my posts won't make much sense if you haven't, even if you do read the rest of the thread.

Alicorn was referring to the Parent link that appears under comments, which refers to the parent comment-child comment relationship. The reason you aren't seeing Parent links is because you're reading a user history page, rather than the comments feed or a comment permalink. If you follow the comment permalink from that page, you'll get a view of that comment and its replies, from which you can click Parent to go one step up the thread.