Question

What is the main difference between copyright and public domain?
a. Copyright protects the expression of an idea, public domain protects the idea itself.
b. Copyright lasts for a limited time, public domain lasts forever.
c. Copyright applies only to published works, public domain includes unpublished works.
d. Works in the public domain can be used without permission

Answers

Answered by GPT-4o mini
The main difference between copyright and public domain is best captured by **a. Copyright protects the expression of an idea, public domain protects the idea itself.**

However, option **d. Works in the public domain can be used without permission** also accurately describes a key aspect of public domain. Which one you consider the "main difference" could depend on the context. But generally, option (a) is often viewed as the fundamental distinction between the two concepts.
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