Earlier quoted context omitted.
> Open-source is used broadly to define a way of developing software, but it says nothing about the rights it gives users. That is totally wrong and a myth spread by people who like to call their products "Open Source" while they aren't. The Open Source Definition is very clear: https://opensource.org/osd Practically there is no difference between Open Source licenses and Free Software licenses. The difference is mer…
> The difference is merely a philosophical one NO. They can be very different practically. For example, your Android phone/router contains open source software pieces (and very likely have GPLv2 licensed code). You get the source code of those, but you may not be able to change them. So yes, they are open source, but not free software. Open source means the code is open, and you can do anything with the code (licensi…
Yes you can. See https://opensource.org/osd-annotated :
> 3. Derived Works
> The license must allow modifications and derived works, and must allow them to be distributed under the same terms as the license of the original software.