director of the University of Michigan Center for Political Studies:
:The central point of Phil's work was the inability of citizens to deal with large quantities of political information and to make it logically consistent, so they are always faced with making decisions based on inadequate information....Phil's original research even helps to explain elements of polarization....People have the ability to screen out discordant information, but they haven't become more sophisticated.

The Nature of Belief Systems in Mass Publics (1964)