 As a characteristic attributed to mental disorder irrationality or “unreason” has been linked to emphasis on order and logic during the “Age of Reason”, which (together with the emergence of empirical science), is seen to have laid the foundation for our contemporary psychiatric categories and  theories.[5]  In the present day, cultural norms and intuitive folk psychology assign the boundaries of mental disorder, and these intuitions conflict about some particular conditions (addictions, and disorders of “character” or personality, for example). Yet disturbed or disabled doxastic states and capabilities remain core exemplars of disorder, over which intuitive agreement is consistent. Characterized by incomprehensibly disordered thought, failure to adjust beliefs in response to new evidence, inconsistencies between thought and action, and delusional convictions, psychosis and psychotic thought patterns are regularly judged prototypical features of mental disorder. So the rationalistic analysis of disorder may yet correspond—but to a reduced version of the presently sprawling overall category.