I'm frequently getting "blind guess" answers, i.e. "try that" or "check this article" - without having any real knowledge of the problem.
Do you think this type of answers is acceptable?
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Without specific examples is hard to tell, but check this article usually qualifies as a link-only answer, so it's definitely not a good answer and it's discouraged.
On the other hand, Try that answers sound more like a comments, so they are usually not in an acceptable form.
Notice my wording: usually. There are cases in which a try that leads to the solution and it was exactly what you needed. Also if the people answering are guessing, it might be that your question is not that clear or thoroughly explained.
For instance, in this recent question of yours
the answer qualifies as a try that, but it provides a good solution to your problem, which - to be honest - wasn't exactly exposed in the best possible format.
Given the question you linked in the comments
I can add a few considerations.
Comments are right place for trying to narrow down the problem. I'm not familiar with the specific topic, but if people are guessing, it probably means you didn't provide enough information to answer the question.
Having people asking you for further details is good behavior and not something to be irritated by. Comments are meant for this, whereas answers are not, but you didn't get any guessing answer to your question.
I don't see anything wrong with that question, except your aggressiveness towards people asking for details you didn't provide.
Agree 100% with Gabriele Petronella, but don't kill the messengers right away. Oftentimes, a try this answer, followed by you trying it, can lead to a clarifying comment from you that helps the answerer write an even better answer that does solve your problem.
Ideally, we wouldn't see try it answers, and for the ones that appear, hopefully we as a community can help those authors improve those posts in order to create a lasting resource that helps others.
I notice that your questions range across many different tags.
The different tags tend to be answered by different groups who focus there. So a question style that works well in one of these SO enclaves doesn't fly so well in another enclave. See, for example, the different way weakly researched or poorly worded questions are handled in [Java] and [C++].
While I would not criticize your questions, I would say that we have to mindful of our readers, and write accordingly. That said, a great question will fly with any SO reader.
Also, the "try that" or "check this article" I saw on your recent questions were comments, not answers. I see don't any harm in them (apart from your reading time): ignore them if they don't help, thank them if they do help.
I think they can be ok answers, depending on how much information they give. Sometimes, on questions I have, one clue may be all I need to figure it out myself. Any help is appreciated.