Descartes “evil genius scenario” provides the possibility for the existence of an evil genius that is in control of our world in place on an omnipotent god. By in control, I mean that he would in some magical way compose our lives by his own will, thus making any certain knowledge about material objects impossible. This scenario presents some real questions with Descartes argument because it basically completely rules out the possibility of any god.
We are imagining that Dr. Spiritus has invaded a small rural hospital and has stolen the brains of several babies. He places the brains in a large vat, provides them with the essential nutrients as well as hooking them up to electrodes that feed the false images into their minds. These impulses that the doctor would distribute at his own will would make the babies brains think that they are actually in their bodies living their lives as normal people. The doctor would provide all the necessary experiences