license
Deductions
- open-source software has quality license ⇐ (free license is subclass of license), (open-source software has quality free license)
- free license is subclass of license ⇐ (proprietary license is subclass of license), (proprietary license is opposite of free license)
- license is for example ineligible for copyright protection ⇐ (ineligible for copyright protection is a license), (is a is inverse of is for example)