What are the elements of poetry as captured in the Aristotle's poetics

Aristotle thinks that this tendency to criticize a work of art for factual errors - such as lack of historical accuracy - is misguided. He believes that instead we should a judge work according to its success at imitating the world. If the imitation is carried out with integrity and if the artwork's 'unity' is intact at its conclusion, a simple error in accuracy will do little to blemish this greater success. Art, in other words, should be judged aesthetically, not scientifically.

In Aristotle's time, the critics considered epic poetry to be the supreme art form, but to Aristotle, tragedy is the better of the two forms. Aristotle believes that tragedy, like the epic, can entertain and edify in its written form, but also has the added dimension of being able to translate onstage into a drama of spectacle and music, capable of being digested in one sitting.