henrikegerman said: "A question I have thoughon these kinds of suits. Leaving aside all other issues,werea court/jury to findthat a work is not a deliberate steal but bloomed insteadfrom the composer's own subconscious where a previously heard melody resides, a melody the composer has noconscious memory of previously hearing (or it cannot be proven that there was such a conscious memory),shouldn't the plaintiff composer still be entitledto some of the defendant composer'swork's earnings?"
It seems the confusion here arises from the conflation of two concepts, plagiarism and copyright. Plagiarism generally refers to a professional standard. It is not thought of as actionable in the legal sense. It might get you fired, kicked out of an organization, subjected to some sanction under a contract, or perhaps tarred and feathered. When an author (in this case a composer) sues another author/composer, it is for copyright violation. To win such a suit, one must jump through all of the hurdles that are found in the copyright law. However, a copyright does not last forever, and once it sunsets under the law, anyone is free to use the material which is said to be in the public domain. There is no sunsetting of plagiarism. If you discover a long-lost additional Goldberg variation and submit it as your own work in connection with your doctorate degree in music, you will go home without a piece of parchment. But you don't have to worry about Bach's ghost suing you. Finally, and relatedly, attribution is a complete defense to plagiarism, but it is of no help in copyright.