[limitedsupply]

Perhaps different media has different rules? You can’t necessarily apply music sampling rules to text, for example. Eg I don’t think incorporating a phrase from someone else’s poem into my poem would be grounds for a copyright violation.

[IncRnd]

"Copyright currently protects poetry just like it protects any other kind of writing or work of authorship. Poetry, therefore, is subject to the same minimal standards for originality that are used for other written works, and the same tests determine whether copyright infringement has occurred." [1]

[1] https://scholarship.law.vanderbilt.edu/vlr/vol58/iss3/13/