How to draw the line between public and private is a foundational, first-principles question of privacy law, but the answer has implications for intellectual property, as well. This project is the first in a series of papers about first-person disclosures of information in the privacy and intellectual property law contexts, and it defines the boundary between public and non-public information through the lens of social science — namely, principles of trust. Patent law’s “public use” bar confronts the question of whether legal protection should extend to information previously disclosed to a small group of people. I present evidence that shows that current application of the public use bar appears to privilege the confidentiality and control...