Yale law professor Ian Ayres continues his American Contract Law course with a segment on consideration doctrine, focusing on intent to contract and the role of the seal. He walks through Cohen v. Cowles Media Co., the case of Dan Cohen, a source who sued newspapers after they broke a promise of anonymity, to examine when a promise becomes a legally enforceable contract rather than a mere assurance. Ayres uses the case to test the boundaries of consideration theory and how courts decide whether an exchange of promises rises to contractual obligation. The lecture is part of Ayres' Coursera-based American Contract Law series, built around case analysis rather than abstract doctrine, aimed at students working through the foundational unit on what makes a promise binding.