because the senses are the first thing to cause doubt. He focuses on the perception of things. He says that things far from him, in the distance, give him reason to doubt their certainty, while things that are close to him are definite and he is clear about their certainty.
             However, Descartes realizes that dreams pose an obstacle to his beliefs. Even up close, dreams can be indubitable. Descartes believes that if a person has had a dream that was so intense that the person could not determine it form reality, then they have reason to doubt objects that are close to us and appear to be indubitable. In order to resolve this problem, Descartes suggests
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