Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Twain issued retraction, too

This is interesting. I've come across this book in the local library, and it seems that he later printed a serious, public retraction of what he wrote. He excused what he had written due to his having had an insufficient understanding of the subject and the basis of its terminology. Everything was grist for his mill, especially such a popular topic of those times, but obviously something happened in his life to occasion this retraction. I agree that most of the posts here show a strong personal bias for or against the subject. All very interesting.Science and Health with Key to the Scriptures (Authorized Edition)