To obtain 15/20 in the dissertation tests of the schools of Commerce it is possible. I suggest you learn to tell a relevant story in your Thesis / Antithesis / Synthesis structure. The secret is to be able to argue with elements of the contemporary world and historical examples. Work by theme: Let's say Plato, Aristotle, Kant, Pascal on the subjects: justice, war, economy, happiness etc. What did economists and sociologists like Bourdieu say? What do the intellectuals of the contemporary world say about it? Illustrate your vision of the world with classic and contemporary references. Illustrate your point by referring to cosmogonic myths. And for a touch of humor, make a reference to a famous quote from a movie and extrapolate to illustrate your point. Pierre, graduated from Business School