Professor Ian Ayres of Yale Law School, teaching from his Coursera course American Contract Law, walks through Beneficial National Bank, USA v. Obie Payton as a case study in silence as acceptance. The dispute turns on whether a credit card company can unilaterally change contract terms, such as an interest rate, and bind the cardholder simply because the customer keeps using the card without objecting. Ayres uses the case to unpack when a party's silence or continued conduct can count as assent to new terms under contract law, part of a broader unit on the bargain relationship. The lecture is short and focused, working closely from the actual case file, which Ayres directs students to read alongside the discussion. It sits within a structured law school course sequence rather than standing alone as a general-audience talk.