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Thread:Copyleft/share-alike (2)
From WikiEducator
a fragment of a discussion from Talk:Libre License
No, because this would open up a way to lock down the knowledge by re-releasing it as (e.g.) copyright all rights reserved.
It might be okay to re-release under a free/libre share-alike license such as CC BY-SA ... but this complicates things (for a start one would need to drop the libre emblem, and successive derived works would have to be exactly CC BY-SA).

