Also, framing the question as 'open source vs copyleft' does not make sense, as these are really two questions 'open source vs free software' and 'permissive vs

Also, framing the question as 'open source vs copyleft' does not make sense, as these are really two questions 'open source vs free software' and 'permissive vs copyleft'. The first question is mainly about branding of free/open-source software, whether emphasise pragmatic aspects, or idealistic aspects (user freedom). OSI is AFAIK agnostic on 'permissive vs copyleft' question.