After Mal and Cobb are brought back to reality, it is evident that she thought she was still dreaming because the idea was still embedded in her mind. In the scene where Mal jumps of the ledge, she is doubtful about what is real and not real and wanted to die because that was the only way to wake up and go back to reality. Even at the end of the movie when Cobb goes home, he spins his top because he is worried that he is still dreaming. I believe that Descartes would think the idea of totems is not possible because if Cobb was dreaming, he would not be able to detect that. One of Descartes’ beliefs about existence and knowledge is the evil demon argument, which explained that all our thoughts could actually not be our own because an evil
