When I was studying in the high school, there was no argument about the source of the information we study, since it was very basic, we assumed it is 100 percent correct and it was kind of black and white. Later on when I joined the faculty of engineering, still we study black and white information with different methods of implementations, the grey area was very limited and this was suitable for BSc level. What I learned so far in my MSc study, there is nothing completely right or wrong; it depends on Expert judgment and how you are going to implement the information and the working environment.