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As I understand StackOverflow is a place to post/answer technical questions such as debugging. Several questions are marked as off-topic on Programmers.SE. I haven't seen a mission statement or guidelines for Programmers.SE topics. Which questions are on-topic here? Where can I read about this?
Sorry for the meaningless keyword, I tried "mission", "goal", "aim", "topic", but none of them are tags. Is this question itself an off-topic?

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