It is a actually something that has bothered me for a while, and I never really know what to do with them.
Many first posters often figure it out by themselves, and post a low effort one liner stating what was wrong.
From a purely objective point of view they don't count as a proper fully constructed answer. But then again it does attempt to answer the question, and often times contains simple solution or pointing what was wrong
I never know what to do with them, they would deserve deletion, but I am always divided because that would just leave an aunanswered empty post. What is more helpful, an unanswered question or a one liner even if low effort?