The Share-Alike license is closest to Libre Puro of all the licenses CC has ever produced.
Some of the rationale for the Libre Puro License might help with this discussion (on ShareAlike 4.0).
Is there room to consider formalisation of something as pro-freedom as this?
Please also read the preamble:
and check out the license deed:
Thanks :-) - Kt 00:26, 11 December 2011 (UTC)