Every language has grammar by definition. We're just trying to discover it. It's like the laws of physics: We have laws which seem to work, but we know they're

Every language has grammar by definition. We're just trying to discover it. It's like the laws of physics: We have laws which seem to work, but we know they're not the whole story, so we observe more of what happens and try to bring our laws into harmony with the actual underlying laws.