Mr. Dolphus Raymond is known as the town drunk, because he always carries his drink in a brown paper bag, and tends to sway a bit in his walk. Mr. Raymond is also married to a black woman and has mixed children. When running from the courthouse, Dill and Scout run into Mr. Raymond and he offers Dill a sip of his drink. Scout is wary, but Mr. Raymond promises Dill it will make him feel better. Dill takes a sip and discovers Mr. Raymond is hiding a bottle of Coca-Cola in his infamous paper bag. Scout asks why he does such a thing, and Mr. Raymond explains he feels he has to give the population some reason for his odd behavior (being friendly toward black people). Mr. Raymond believes it's easier for people to handle strangeness when they have a reason to explain it. Thus, he pretends to be a drunkard.
The Preamble to the Constitution outlines the purposes of the Constitution, and defines the powers of the new government.
They could physically hurt you for not cooperating
That people were supposedly being treated improperly
Latin terms "a priori" and "a posteriori" are the philosophical phrase that Immanuel Kant popularized and made possible their widespread use in his work "Critique of Pure Reason". Much earlier, before this popularization by Kant, these terms are used in Latin translations of Euclid's Elements, about 300 BCE.
These terms are used in relation to reasoning and conclusion, which distinguish "premise" conclusions from those that come after, conclusions based on sensory observations.
A Priori conclusions are independent of experience, for example 4 + 5 = 9, and result from pure reason. We do not need experience, but reason.
A posteriori conclusions come from experience and empirical evidence. They necessarily imply a general conclusion, for example, Civil War in America ended in 1865. If this is true we must conclude on the basis of an empirical fact that can not be recognized only by reason, and comes a posteriori.
So, "a posteriori" phenomenon is the answer.