Here he states that sometimes when we dream we cannot distinguish between being awake and being in a dream because the dream is so immersive. However he rejects this hypothesis due to the greater coherence in our perception when we are awake. This shows that we cannot trust our senses because sometimes they cannot tell us whether we are in a dream or not and there is no criterion. Descartes then moves on to the crazy hypothesis that when internal conditions are not ideal one cannot trust oneself in one's surroundings. However, Descartes also rejects this theory because he knows what is right and what is wrong and can reason, which a madman cannot do. Then Descartes moves on to God who deceives us, where there is an omnipotent God who can easily deceive us by making the concept of mathematics false. However, since God is all perfect, He will not try to deceive us about fundamental concepts or deceive us at all. Now suppose that God does not exist, then in His place there is something else. Descartes classified it as the evil genius hypothesis where there is some kind of demon that has made him believe that everything he knows is false and is deceiving us. This means that all beliefs about the outside world are questioned and everything he knows and thinks is controlled by the evil demon. By observing the subsequent meditations, one knows that God is not a deceiver and that he does not exist