Title: Descartes’ Argument Against Deception by the Malicious Demon Premise 1: There exists a malicious demon of great power and cunning. Premise 2: This demon has used all its abilities to deceive me.

Consider the following passage from Descartes’ Meditations: 
Some malicious demon of the utmost power and cunning has employed all his energies in order to deceive me. I shall think that the sky, the air, the earth, colours, shapes, sounds and all external things are merely the delusions of dreams which he has devised to ensnare my judgement … I have convinced myself that there is absolutely nothing in the world. Does it now follow that I too do not exist? No: If I convinced myself of something then I certainly existed … let him deceive me as much as he can, he will never bring it about that I am nothing so long as I think that I am something.
Reconstruct this, in your words, as an argument in the standard ((premises-conclusion) form.