alt Hacker News> “Free software” means copyleft.
No, it doesn't. The FSF uses “Free Software” to refer to a broad class that is essentially identical to the OSI use of “Open Source.”
The term the FSF uses for copyleft is “copyleft”, which is a subset of Free Software.
To underscore the point here: the FSF
1) hasn't/doesn't publish a free software definition that describes copyleft as a precondition to free software
2) hasn't/doesn't claim in any of their non-normative commentary that the definition has that precondition
3) readily and regularly refers to projects published under permissive licenses like the BSD, MIT/X11, and Apache licenses as "free software", despite not being copyleft licenses
4) themselves publish/maintain/govern software projects that are licensed under permissive licenses like the aforementioned non-copyleft licenses
The claim that "'free software' means 'copyleft'" is a pernicious, bizarrely recurring but wildly misinformed claim that only shows up on message boards by people who can't ever have actually read primary sources that explain the positions of the organization they purport to describe, and have instead just, like, decided they understand the topic (through, I dunno, osmosis or something, I guess).