Thread:HybridNova/@comment-10483040-20151110120051/@comment-24801290-20151111013747

On the front page of the wiki (which admittedly I and possibly a lot of people rarely go to) it says this:

"Do not reply to posts older than 1 week, always look at the dates of the post and it's replies to ensure you do not break this rule."

Dead comment threads are defined as all threads that haven't been commented on for over 7 days.

They don't look any different from normal comment threads though so you have to look at the little grey text on the bottom of the post.