Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Thesis
The term "thesis" comes from the Greek , meaning "something put forth", and refers to an intellectual proposition. "Dissertation" comes from the Latin "dissertātiō", meaning "discussion". Aristotle was the first philosopher to define the term thesis. "A 'thesis' is a supposition of some eminent philosopher that conflicts with the general opinion...for to take notice when any ordinary person expresses views contrary to men's usual opinions would be silly".For Aristotle, a thesis would therefore be a supposition that is stated in contradiction with general opinion or express disagreement with other philosophers (104b33-35). A supposition is a statement or opinion that may or may not be true depending on the evidence and/or proof that is offered (152b32). The purpose of the dissertation is thus to outline the proofs of why the author disagrees with other philosophers or the general opinion.