There is also the gross ethical error making people doing their own original work vulnerable to being sued into the poor house.If it is original then it must by definition be novel and thus not patented.
You have to understand the nature and relatively frequent occurrence of independent discovery to understand the point. Here, the author explains their remark:
The point of the temporary monopoly is a motivation for sharing inventions we wouldn't just trip over anyway. Isn't it?
The situation which patents create but copyright does not is one where someone can be punished for doing something they didn't know had been "forbidden" but which is a consequence that follows from stuff they already know. It's like aliens coming to Earth and suing NASA for landing people on the Moon because they have a patent claiming a monopoly on landing organisms on another planetary body.
Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds