A rivalrous good is like a ham sandwich. If I've got it you don't have it, if I give it to you, I no longer have it. And if you eat it, its gone forever.
A non-rivalrous good is like an mp3 file or language, or geometry. If I've got it, I can give it to you while still having it. And the more people who have it, the more useful it is.
A non-rivalrous good is like an mp3 file or language, or geometry. If I've got it, I can give it to you while still having it. And the more people who have it, the more useful it is.