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    But what about writing the same question in 2 different languages? Eg. Post in Portuguese SO and International SO. Commented Jul 12, 2017 at 18:27
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    What is the correct way to handle identical posts across SE/SO sites? Flag a mod?
    – ashleedawg
    Commented Feb 21, 2018 at 8:05
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    what about questions about interdisciplinary topics? I have a question about differential geometry and quantum computation, and I see no reason why the question couldn't be asked in both the math and physics site. Commented Nov 14, 2018 at 13:51
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    @JonEricson, This wording was recently edited to be more wishy-washy. I want to register my disappointment at those edits. For instance, the first line used to be "NO"; now it has been caveated with "as a general rule". Also the last paragraph leaves the impression that it's allowed to cross-post the identical same post to multiple sites and that tailoring your post to each site is better but not required.
    – D.W.
    Commented Apr 13, 2019 at 19:12
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    I don't think that's good policy for us to set. I imagine many people may look at that and say "well, if it's allowed, I'm going to do it; I'd like to get more attention to my posts" -- and I don't think that's good for the Stack Exchange community. I think instead that the bare minimum should be that if you are going to post to multiple sites, you must tailor each copy to that site (copy-pasting the same question on multiple sites without changes is never ok), and that you must cross-link between them (even if you're not posting simultaneously).
    – D.W.
    Commented Apr 13, 2019 at 19:12
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    @D.W. "copy-pasting the same question on multiple sites without changes is never ok". I strongly disagree. Sometimes it's fine. Sometimes the question cannot be tailored because the site scopes overlap too much. Allowing cross posting (an auto-linking between cross-posts) seems much better all around. I'm tired of seeing cross-posts with tiny cosmetic changes just to get around this "rule". They're the same question, we just forced the OP to waste time with silly minor changes so that they won't be accused of cross posting.
    – terdon
    Commented Apr 15, 2019 at 9:59
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    The views from this question has made a law that one cannot post same question in two different sites, although the question may have two different perspective. Is the site encouraging satisfaction of knowledgeable people or increase knowledge of humanity?
    – Creator
    Commented Apr 19, 2019 at 19:25
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    I think StackExchange should implement actual cross posting (instead of multi posting). This would be similar to tags but for whole sites themselves. Then you could mark a question as belong to both Math and Physics communities without actually duplicating it. I get this might be dangerous in terms of spam since newbies would likely tag every site they can think of but I think that could be counterbalanced by implementing a rep requirement to use that ability. The req could be extremely high rep on one of the sites or reasonably high on each site. Commented Sep 28, 2020 at 14:26