1 INTRODUCTION
A theory is defined in Encyclopædia Britannica as follows:
Scientific Theory. (2010). In Encyclopædia Britannica. Retrieved February
10, 2010, from Encyclopædia Britannica Online:
http://search.eb.com/eb/article-9066294
“systematic ideational structure of broad scope, conceived by the human
imagination, that encompasses a family of empirical (experiential) laws
regarding regularities existing in objects and events, both observed and
posited. A scientific theory is a structure suggested by these laws and is
devised to explain them in a scientifically rational manner.”