I don't think that Jay-Z freestyles his albums. I've seen interviews where he talks about how he records. He doesn't ever write down rhymes, but he does memorize entire songs. He said that he started it because he hated carrying around little scraps of paper with his rhymes on them in his pockets. Just because a rhyme isn't on paper doesn't mean it's freed does it? Perhaps I'm misinformed. If I am, please correct me.

Peace