I am a little bit confused why adding new answers is not possible for questions that have "(Closed)" in the Post Title. Comments are available in such posts. Despite all this such question appear in the list of OPEN questions on Biostars. As a result, there are thousands of "(Closed)" questions in the list of OPEN questions.
Also, we have OPEN questions that are several years old and not yet have "(Closed)" in their name. Does it mean that Biostar's community is "still looking for the answers." If so, then should we go and try to answers that are a few years old?
If those people "are still looking for an answer" may be debatable but you can certainly add an answer, if you have one. Adding a new answer "bumps" the question up to the main page automatically.
I get it. "(Closed)" appears together with the words in "The thread is closed. No new answers may be added." below the conversation. But my question is not technical at all. I am trying to understand the reasoning behind such classification of "(Closed)" questions as OPEN.