I once had an argument in another community on here about something very similar. And they told me I was wrong. The mods deleted my posts.
I posted the links and the definition/requirements for FOSS as compared to just open source.
They kept telling me i was talking about open source and not libre.
The links and definitions and requirements I posted:
From Richard Stallman, from the site whose creators developed the rules and requirements for FOSS, GNU.org, and from the itsFOSS site which, indeed, references and links to the first 2.
The definitions also explicitly state the difference and uniqueness of each and compares them to the nonstandard open source (source available) labels.
I unjoined that community and found a less ignorant one.
Go to gnu.org