[shagie]

In the US it isn't the sweat of the brow, but rather a minimal threshold of human creativity.

https://en.wikipedia.org/wiki/Sweat_of_the_brow

https://en.wikipedia.org/wiki/Copyright_law_of_the_United_St...

[reverius42]

Oh, good point. It's not related at all to effort then. Either way it still has to be a human.

[JAlexoid]

Software is considered a complete piece of work. Therefore as long as you modify a single character - that whole product is under your copyright.