Christine Lemmer-Webber@bkuhn @dos @dpk I think copyleft with source-requirement is good, though I'm not convinced it's viable for all places where CC BY-SA is useful for. For example, distributing raw film footage and editing files for some videos isn't really necessary and may be an unnecessary burden if you think about much of the video content out there today, so having a weaker version of "copyleft" is sensible to me. I would be fine with a different term for it though.
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