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.
A main point in an argumentative paper is a reason that supports the author's thesis. (Not all sources are argumentative, of course, so some main points may simply be the major subdivisions of the document.) Main points may range in length from one paragraph to several paragraphs.