It's not ambiguous because there are multiple ways to parse it. It's ambiguous because all tokens are identical save capitalization and represent different POS

It's not ambiguous because there are multiple ways to parse it. It's ambiguous because all tokens are identical save capitalization and represent different POS elements based on position and context. I am not sure what your definition of "expressive" is. To me, effectiveness to convey thought or ideas in this context. And I don't have the faintest idea of what that sentence means.