Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extratesticles: Where are They?

This author, like many who make claims about the future of the human race, is overly optimistic about what human civilization is capable of. The arguments in this book are terrible. No conclusions logically follow and you can barely find a sentence without some large assumption. I was hoping for some analysis of the question of whether extraterrestrials exist, but this book is just an analysis of the Fermi Paradox and speaks only about our galaxy which I found to be incredibly disappointing. This book is just a bunch of farfetched dreams of the avid science fiction fan.