(Yes, that guy at the end of the commercial is Robert Vaughn. You may know him from such films as Pootie Tang and Escape to Witch Mountain)

Definition: 1 : a resolving of specific cases of conscience, duty, or conduct through interpretation of ethical principles or religious doctrine 2: specious argument : rationalization

Quotation:

The T.S.A., whenever it is called on the carpet (which is often) about the two-tiered system it countenances, responds with the same piece of casuistry. The rich are scanned the same way as everyone else, the T.S.A. insists, but the formation of the queues themselves is not our department.

- from the column “The Way We Live Now” in the New York Times Magazine by Christopher Caldwell

I think about half of legalese could fall under the term casuistry