On the "A Thought Experiment…" thread, there are 11 pages of posts listed, and I keep getting reply notifications, but when I try to open the last page of the thread, clicking on the number 11 under "Go To Page", i get "No posts exist for this topic".
When i follow the link in the reply notification e-mail, I get "The topic or post you requested does not exist".
The thread still lists 11 pages, but the last one I can open is 10.
What is happening is that spammers are posting in these threads things like “See hot girls getting dicked” and spam fighters, such as myself, delete them. You get a message about a reply, but the reply is porn. That is why you get the “no post exists” message. It got deleted by spam fighters.