<p>Questions can be on-topic on multiple sites. <strong>In principle a question should be placed on the site that is most suitable.</strong></p>
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<li><p>But this can be difficult to determine. There might be multiple reasons why a person asks a question on CV instead of AI, and we should not overrule this when a question is on-topic.</p>
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<li><p>Also, it doesn't hurt if occasionally a question turns up on a different site (it may be even beneficial), or gets cross-posted.  Already because of that we should not actively promote to move questions that are on-topic here. The point of  multiple SE sites is not (I believe) to have sharp boundaries between them. That is <em>not</em> going to be a benefit. To me this idea of cohesive (but separated) communities sounds like the opposite of collaboration.</p>
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<p>Alternatives would be to <a href="https://data.stackexchange.com/stats/query/114513/search-comments" rel="nofollow noreferrer">mention ai.stackexchange</a> more often in the comments (currently this only occurs 44 times). Make more references in tag infos (currently this happens for <a href="https://stats.stackexchange.com/tags/artificial-intelligence/info">artificial-intelligence</a>). Be more open to cross-posting. (And probably there are many others.)</p>
