Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you have to take a class in this, kill yourself.

Let me start by saying I received an A in the class. I wasn't too dim to understand the material, so this isn't whining from a bruised ego. Logic sounds cool. It isn't! I don't know if it's possible to make logic logical or not, but this book is a collection of poorly explained utter nonsense. Logic seems to combine the worst aspects of algebra and philosophy into one poorly organized discipline. This book doesn't help. It introduces ill conceived and vague concepts in a manner that seems to revel in their obscurity. It's like reading a review of the unix programming language from the guy that created unix. There are probably 8 people on Earth that would dig it, the rest... not so much.