Truth

Think of being wedded to the 'truth'. Consider relativism. Can any statement be said to be true? True for whom, and for when? Truth in logic, in science, in criminal investigations.

Moral truth. When is it a good idea to lie? Is lying ever morally justifiable? Think of situations in which lying produces more 'good' than the revelation of the truth.

Try to think of a work that can only be true.