Is the "whole truth" attainable? -- Truthfulness, deceit, and trust -- Never to lie? -- Weighing the consequences -- White lies -- Excuses -- Justification -- Lies in a crisis -- Lying to liars -- Lying to enemies -- Lies protecting peers and clients -- Lies for the public good -- Deceptive social science research -- Paternalistic lies -- Lies to the sick and dying -- Conclusion -- Appendix. Excerpts from works by Augustine, Aquinas, Bacon, Grotius, Kant, Sidgwick, Harrod, Bonhoeffer, and Warnock.