Yeah I mean sentences or paragraphs. Paragraphs would make it a lot easier but a truly creative person could use sentences. Yes you could take the same chords from that song...then if you took the same drums from another song by the same artist, then the same x from another song, so on and so forth. It's how a lot of techno is made, these days, too. You take prefabricated sounds and put them together in a way that sounds nice.
Heck. I can do that on the simplest level.
Ha-ha, yeah a lot of 'em do!
On the other hand what their doing is sampling. They still have to get permission or they can be sued. U.S. and International copy write Laws prohibit one from just sampling from another’s work without permission. In music as well as writing. Take Mr. Sanderson for example, he has permission to work on Robert Jordon's AMoL, without that, it would be illegal. Society as a whole made these laws because they felt it 'is' unethical to sample or otherwise steal from another body of work. That, I think, is what the main question of this thread is about. Yes, someone could and probably will, but it is still unethical.