Hotly contested and vigorously defended since it was first written into the Bill of Rights, freedom of speech is a basic right that all Americans hold dear. But what of the freedom not to speak? Should, for instance, a special prosecutor be able to compel a mother to testify about, and incriminate, her own daughter? The freedom not to speak is an implicit "right" that holds great relevance for all of us-the freedom not to speak when...