For now (and I guess the foreseeable future), this is done manually. In particular many times it reqiuire a few juice calls, like which one was posted first, wh

For now (and I guess the foreseeable future), this is done manually. In particular many times it reqiuire a few juice calls, like which one was posted first, which one has more discussion, which has better info, if there is an important update, and perhaps a few more... If you see one, send an email to hn@ycombinator.com so dang/tomhow can take a look. They usually reply a few hour later or sooner. Remember to include the links to both threads in HN to save them the problem of searching them that sometimes is not obvious.