That does not make it a etter or worse idea though. Realistically, most people will only ever have ideas that someone else somewhere else will already have had

That does not make it a etter or worse idea though. Realistically, most people will only ever have ideas that someone else somewhere else will already have had. Does that mean, that the idea is commonly known? Not necessarily. It is also still an original idea in terms of you having thought, that was not easily derived from what you know (but probably somehow derived, like all thought likely is).