Where do science, morality and public policy intersect? Should they intersect? We’ll discuss the issue this hour with journalist and practicing psychotherapist Gary Greenberg, whose new book is “The Noble Lie: When Scientists Give the Right Answers for the Wrong Reasons” (Wiley, 2008).

How is depression diagnosed? Psychologist Gary Greenberg volunteered for a study on mild depression and was quite surprised, after examination, to be diagnosed with major depression. He writes about the experience in his current Harper’s Magazine cover story “Manufacturing Depression: A Journey into the Economy of Melancholy.” We’ll talk with him this hour.