copyright license

Deductions

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