Or a couple hundred, if we're using Shakespeare as a benchmark.
So the determining factor in how we percieve copying is whether anyone can remember how innovative the original was? That seems really strange to me. It takes just the same amount of work to retell Homer as it does to retell Star Wars, if you're not taking technical writing skill into account. But people look at
Omeros and say "what a masterpiece!" whereas they look at
Eragon and say "overblown and derivative." So why is it that finding that the plot is modeled after The Odyssey makes us happy but finding elements of Star Wars ticks us off?
Is it because it's impossible
not to use the archeypes in myth?