The Cogito Argument

He continued his Quest for Certainty and tried to raise skeptical hypothesis to his very existence and here's what happen.

Premise 1: If I try to persuade myself that I don't exist, then still I exist as the thing that persuade myself.

Premise 2: If I am just being deceived by an evil genius (Meditation 1) that I don't exist, then I certainly exist as the thing being deceived.

Conclusion 1: I cannot doubt my existence (From premise 1 & 2)

Conclusion 2: I am certain that I exist when I think. (From Conclusion 1, premise 1, & 2)

(Many scholar attributed here the famous quotation of Descartes...)