I was recently going through the book of Hornick et al. named Java Data Mining. Unlike this earlier post, the focus today is not about using Java for data mining. However, I read a line in this book which makes me react. Here is the line: “These users [marketers] either know nothing about the techniques of data mining or do not need to know anything about data mining to reap its benefits“. I remember following a doctoral course on data mining where the teacher, a professor in machine learning, was claiming that people should not use data mining as a black box tool. If this is the case, the so called garbage in, garbage out situation is likely to happen. Do you think using data mining as a black box tool is justifiable? What is your mind about that?