Could someone kindly explain exactly to me the difference in the meaning?
1. He was all but unconscious.
2. He was nothing but unconscious.
"all but unconscious" means very nearly unconscious. g. "nothing but bad", meaning entirely bad or wholly bad, but "nothing but unconscious" does not seem a likely thing to say.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
"all but unconscious" means very nearly unconscious.
"nothing but ~" works with some adjectives, e.g. "nothing but bad", meaning entirely bad or wholly bad, but "nothing but unconscious" does not seem a likely thing to say.