Blindspots analysis (also blind spots analysis) is a method aimed at uncovering obsolete, incomplete, or incorrect assumptions in a decision maker’s mental scheme of the environment. Michael Porter used the term "blind spots" to refer to conventional wisdom which no longer holds true, but which still guides business strategy. The concept was further popularized by Barbara Tuchman, in her book The March of Folly (1984), to describe political decisions and strategies which were clearly wrong in their assumptions, and by other authors since, such as social psychologists Mahzarin Banaji and Anthony Greenwald in their study of prejudice.