"The certificates we use to make certain of one another: contracts, licenses, ID cards, permits, deeds, certifications, registrations, carry permits, union cards, testimonials, bills, IOUs, temporary permits, letters of consent, income statements, certificates of custody, even proof of pedigree. Is that all of them? Have I forgotten any? Men and women are slaves to their fear of being cheated. In turn they dream up new certificates to prove their innocence."