sharp distinction
Antonyms
Examples
A master in the art of living draws no sharp distinction between his work and his play; his labor and his leisure; his mind and his body; his education and his recreation.
That attitude does not exist so much today, but in those days there was a very sharp distinction between basic physics and applied physics. Columbia did not deal with applied physics.
I would draw a really sharp distinction between creating and producing. I think that they're very different things.