Answer
1. Works in the public domain: Any work that is not protected by copyright or whose copyright has expired is considered to be in the public domain. You can use such works without obtaining permission.
2. Facts and ideas: Copyright does not protect facts, ideas, or concepts. You can use them without obtaining permission.
3. Short phrases and titles: Short phrases, titles, and slogans are not protected by copyright. You can use them without obtaining permission.
4. Fair use: Fair use is a legal doctrine that allows you to use copyrighted material without obtaining permission under certain circumstances, such as for criticism, commentary, news reporting, teaching, scholarship, or research.
However, it is always best to consult with a legal professional to determine if your use of copyrighted material falls under any of these scenarios.
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