I don't think using data as input to an algorithm necessarily breaks copyright law. I can read a book to post my impression on it somewhere right? I can read i

I don't think using data as input to an algorithm necessarily breaks copyright law. I can read a book to post my impression on it somewhere right? I can read it and say "it was beautiful" on twitter. I can then automate my "taste meter" through machine learning, it reads a given book character by character, and spits out what I'd think of it if I actually read it. Then posts it on twitter, says "it was beautiful". Did I break copyright law? I don't think so.