There are several distinctions that are quite subtle but very real.herodotus wrote: Thu Feb 13, 2020 2:19 pm This distinction may seem overly subtle. But it is very real. Consider the fact that drum parts (arrangements) in pop songs are usually not protected by copyright, but a particular recording of a particular performance of that drum part would very much be protected by copyright.
And these fuzzy words affect our communication and the mutual abstract visualization of the object we are working on.
Maybe it doesn't matter too much. But having a clear target for collaborative work seems handy to me.