Philosophical Response: Existence of God and Free Will

Consider Descartes' statement: "Even the most reliable of our senses can sometimes deceive us, and what is true when we are awake can be found to be false when we are asleep." - René Descartes (Meditations on First Philosophy) Is scepticism about the external world justified? Develop a response in which you consider two alternative views. Provide and justify your own view.