Why do we find it so difficult to keep opposing ideas alive in the same mind?
To quote the late great Christopher Hitchens in introducing his autobiography, Hitch-22, “The most intense wars are civil wars, just as the most vivid and rending personal conflicts are internal ones, and what I hope to do now is give some idea of what it is like to fight on two fronts at once, to try and keep opposing ideas alive in the same mind, even occasionally to show two faces at the same time.” From the personal to the political, and the intersection of the two, why do we find it so difficult to keep opposing ideas alive in the same mind?