A good example of a bell curve or normal distribution is the roll of two dice. The distribution is centered around the number 7 and the probability decreases as you move away from the center. Here are the % chance of the various outcomes when you roll two dice.
main argument definition, main argument meaning | English dictionary. [. 1 chief or principal in rank, importance, size, etc. 5 a principal pipe, conduit, duct, or line in a system used to distribute water, electricity, etc.
In writing, an argument is a way in which one proves a thesis or main idea of an essay or longer researched writing. This is often confused with writing contentious work that deliberately attacks or inflames an opposing viewpoint without support. The argument is actually the support of the main theme, and is not an opinion, and is based on facts and evidence.