@Suiseiseki that you won't land in legal hot water for creating derivatives (various restrictions notwithstanding ofc). I hear OSI publishes a pretty decent definition if you want a more formal one :blobfoxsmirk:

granted that more explicit terminology seems preferable to me. it's an unfortunate historical detail that we ended up with such an easily abusable term. I tend to use "FOSS" most of the time altho plenty of people will still object that it doesn't clarify whether the license is permissive :puniko_shrug: probably can't please everyone