[amelius]

> Also, discriminating like you suggest would make those licenses closed source by definition.

Definitions are not what matters in the end. Why doesn't the viral and restrictive element of GNU's GPL license make the license "non-open"?

[beojan]

Definitions are what matter, they're the reason you can use words and I can understand what you mean by them.

"Open source" has a definition (https://opensource.org/osd) and the GPL meets it, because it doesn't prevent derived worries from being distributed under the same license.