The following excerpt is from Skidmore v. Led Zeppelin, 905 F.3d 1116 (9th Cir. 2018):
3 The extrinsic test is one of two tests used to determine if an allegedly infringing work is substantially similar to a copyrighted work. This test objectively compares the protected areas of a work. See, infra p. 1125; Swirsky v. Carey , 376 F.3d 841, 845 (9th Cir. 2004).
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