He describes a patient whose moralreasoning has been disrupted by surgery to separate the hemispheres, who then judges that it is acceptable for a waitress to serve sesame seeds to someone she thinks is allergic to them, but who is not.
Here is an example of the perverted moralreasoning that results from the left's illusion of moral authority: For Walsh, it is not as bad for liberals to use the coercive power of the administrative state to subvert democracy as it is for conservatives to vote.