Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unsubstantiated, street smart'(!) and useless advice

...Because the guy downplays the role of scientific research in developing arguments and concepts, his arguments are based only on selective circumstantial evidence. Hence, you are not sure whether to take them seriously or not so seriously. But thank goodness they are so rudimentary that you don't have to go through such a questioning process. If you are selling pans and pots door-to-door, you may find some good advice in the book. If you are looking for something more on conceptual and intellectual levels with hard evidence, don't bother. Look elsewhere.