There is absolutely no support to mark questions as "solved" in the forum software, so this would be a totally manual process both for the person asking the question (who has to mark it as solved) and some admin (to move the thread afterwards).
There are over 5000 threads here, so even if 30% were marked answered you would have to check over 1000 threads which would not be very doable (try finding a specific tutorial in the tutorials section, that has only 119 entries). So you would need a search tool anyway, and coincidentally there is a "Search" field near the top of the home page to see if the question exists (even if not marked answered).
There are over 5000 threads here, so even if 30% were marked answered you would have to check over 1000 threads which would not be very doable (try finding a specific tutorial in the tutorials section, that has only 119 entries). So you would need a search tool anyway, and coincidentally there is a "Search" field near the top of the home page to see if the question exists (even if not marked answered).