Javier Hernandez - Crime Fighter?
As human beings we have a deep-seated desire to explain natural and social phenomena. We have an in-built search mechanism which looks for causation in order to explain the world around us. For example, the US stock market declined on the day after Obama's election. Why? Most people connected the two events, but the two may have been totally unrelated. Another example can be found in today's Metro where it is claimed that crime falls and birth rates go up in Mexico City whenever Javier Hernandez is playing for Manchester United. These may simply be crude correlations and there may be no causation whatsoever. It requires rigorous statistical testing to demonstrate correlation never mind causation!