There are many theories of behind defining mind to be an immaterial soul however there is no real theory to support that notion except assumption. Mechanical mind can fully explain the reasons of the mind. The Cartesian theory is more in line with the Bio psychosocial model. The interconnection theory between the psyche and soma proposed by Descartes has a lot of loopholes that can be explained by science.According to the theory of Dualism the functions of the body work according to the worldly and automatic principles of the world. The mind however is not confined to any of the mechanical principles. This theory proposed by Dualism says that mind is an immaterial soul. Again when there is a logical rational explanation regarding working of the human mind the concept that it is not bound by any theories seems irrational. There are a lot of theories proposed regarding the mind like Cartesian theory, parallel theory, and single state of mind. These theories are all interconnected to explain the concept of immaterial mind. The theorists have attributed the different theories for the immaterial mind as interrelated in many cases. When the fundamental perception of mind as an irrational soul does not seem to be valid these theories do not seem to be valid.