Are questions involving opinions allowed?

Question

I have got a question about asking questions about opinions: Why are they not allowed? As far as I know, I don't find anything wrong with them.

And, if this question is closed, that would be a philosophical contradiction.

Answer 1

Questions about opinions are allowed under some circumstances, highlighted in the Help Center article What types of questions should I avoid asking?. First, what kind of questions are not allowed:

If your motivation for asking the question is “I would like to participate in a discussion about ______”, then you should not be asking here.

To prevent your question from being flagged and possibly removed, avoid asking subjective questions where ...

• every answer is equally valid: “What’s your favorite ______?”
• your answer is provided along with the question, and you expect more answers: “I use ______ for ______, what do you use?”
• there is no actual problem to be solved: “I’m curious if other people feel like I do.”
• you are asking an open-ended, hypothetical question: “What if ______ happened?”
• your question is just a rant in disguise: “______ sucks, am I right?”

Second, what kind of opinion-based questions are allowed?

Some subjective questions are allowed, but “subjective” does not mean “anything goes”. All subjective questions are expected to be constructive. What does that mean? Constructive subjective questions:

• inspire answers that explain “why” and “how”
• tend to have long, not short, answers
• have a constructive, fair, and impartial tone
• invite sharing experiences over opinions
• insist that opinion be backed up with facts and references
• are more than just mindless social fun

For more detail, read about our guidelines for great subjective questions and blog post about how real questions have answers.

Of course, there is a gray area; for those cases, we have the review queues where the community can decide whether a question is appropriate for Chess Stack Exchange or not.

Answer 2

As far as I know, I don't find anything wrong with them.

In that case, go away and set up your own "ReinstateMonicaExchange" site where such questions are allowed. This site is not all about you. It's about all of us.

Joking aside, the first thing you need to do is go away and read the relevant topics in the Help Center. Read all of it, but pay particular attention to what it says about What types of questions should I avoid asking?.

The key point is that suitable questions should have definitive answers. If my opinion on a subject is different from yours and both are arguable then the question is not suitable. The site is not supposed to be about arguments and discussions. It's supposed to be about facts.

Another relevant answer to this question is this one from Glorfindel.

Coming back to:

And, if this question is closed, that would be a philosophical contradiction.

Depends on why it would be closed. For instance if it were closed for being a duplicate of this question. It isn't, so it hasn't been.