> As far as I know the only OS License that has been deemed enforceable is GNU General Public License.
The OSI recognizes a number of different licenses, as do the attorneys of the numerous individuals and companies making use of them.
> It's free software
It's not, unless I have a legal right to redistribute a modified copy.
"Open source" and "free software" both have requirements to meet their respective definitions. And additonally, "source is viewable" is not the same thing as a license.
From the open source definition: https://opensource.org/osd
> As far as I know the only OS License that has been deemed enforceable is GNU General Public License.
The OSI recognizes a number of different licenses, as do the attorneys of the numerous individuals and companies making use of them.
> It's free software
It's not, unless I have a legal right to redistribute a modified copy.
"Open source" and "free software" both have requirements to meet their respective definitions. And additonally, "source is viewable" is not the same thing as a license.