Simple observational numbers absent of a random trials and scientific experimentation are not enough to convince us to change practices honed by years of experience.
In late December of 2011, while browsing the Internet, I came across an article about a random reporter who obtained the email address of a famous billionaire by conducting a simple Google search.
In Ghana, for example, sixth-graders sitting a simple multiple-choice reading test scored on average the same mark that would be gained by random guessing.