The main idea of an essay is called its

The main idea of an essay is called its thesis statement, which would usually tell the reader what would be talked about later on in the essay.

hope this helps

if you don't mind posting the paragraph so i could read it that would a lot. (;

an great real life example for the lottery principle is the real life lottery itself. it adheres to the lottery principle so much it's even called lottery. you apply for the lottery in the manner of getting a ticket and if you are lucky, the goods are distributed to you, in this case, the huge amounts of money. there are other real life example but this is the best one.