Instruct: Classify Amazon reviews into positive or negative sentiment
Query: can't be taken seriously

When a book contains the following sentence, it's hard to take it seriously:"The establishment of the Romanised Christian era marked the beginning of the Dark Ages: the priod of Western history when the lights went out on all learning, and superstition replaced knowledge. It lasted until the power of the Roman Church was undermined by the Reformation" (70).This flies in the face of extensive historical scholarship over the past century, and alone casts doubt upon the credibility and motives of the authors.