allisrelative said:
All of the good threads seem to be locked
In PF, there are three main reasons of locking a thread:
1. It has deviated from the main topic, or the same thing was being discussed in circles without coming to any conclusion, as stated in post #3,
3. Locked because of inactivity, as stated in post #4.
There are a lot of threads that are open for discussion. In addition, you are welcome to create your own threads.
If you have a question/want to discuss something you found in a locked thread, you can create a new thread, put a reference to the locked thread (or a specific post therein), and start off. However, note that your new thread should follow the guidelines, otherwise it may be closed by the moderators. In the past, the rules were less strict, so you may find old threads that violate the current guidelines but are locked due to inactivity instead of violation of rules. You should not start a discussion on such threads. If you are unsure whether the topic that you want to discuss is allowed or not, you can contact a moderator privately before posting the thread.
As a rule of thumb, anything in mainstream STEM is allowed.