Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If Trefil really has the facts, why does he need to abuse logic???

Co-author Trefil's pro-choice ideology got in the way of his using his common sense.To make a long story short, Trefil writes that scientists can manipulate eggs, in order to cause them to develop into embryos. Therefore, he posits, eggs are somehow equivalent to embryos.Trefil "forgets" to mention that there is a BIG difference between a manipulated egg and an unmanipulated egg...just as there is a BIG difference between a fertilized egg and an unfertilized egg.Trefil outlandishly concludes that, since this manipulation of eggs into embryos is possible, pro-life women who shed unfertilized eggs each month should be concerned that they are actually having abortions.It's hard to get more "unscientific" than this! Don't forget to put on your "thinking cap" when you enter Trefil's world.