Lossless compression _is_ a scorecard for lossy compression. Thanks to the ideas from arithmetic coding.
Even then, given half of any sentence in the book, I don’t rate my chances of reproducing the next half. That’s more a question of knowing the author’s style than knowing calculus itself.
Does arithmetic coding capture all of that?
Now, who will get closer to the algorithm with that added arithmetic coding? You, knowing the proofs, or a random guy that doesn’t even speak the language? Does it then measure intelligence all else being equals!