Final answer:
The definition of mental pathology as 'not normal' is inadequate because it implies rigid standards of normality and ignores the complexity that varies in different contexts. Furthermore, identifying the cause of nervous system disorders is challenging due to unknown genetic factors, lack of structural brain defects, and varying symptoms among patients.
Step-by-step explanation:
The shortcomings of the definition of mental pathology as simply meaning 'he is not normal' include strict guidelines regulating normality and the fact that the continuum varies depending on context. This definition is overly simplistic and does not accommodate the complexity of mental health issues. Clinical definitions of mental disorders require consideration of both intellectual functioning and adaptive skills, as well as understanding the individual's capacity to process information and communicate. Merely labeling someone as 'not normal' does not capture these nuances.
Regarding the cause of many nervous system disorders, it is difficult to identify because genes associated with the diseases might not be known, there may be no obvious defects in brain structure, and the onset and display of symptoms can vary between patients. These factors contribute to the complexity of diagnosing and understanding nervous system disorders. Therefore, the correct answer that encompasses all these aspects is. all of the above.