Guillermo Robles took the pizza company Domino's to court because he claimed he was unable to access their website and app to order his meal of choice using the software that reads the screen aloud to him. He also claimed he was unable to take advantage of their discounts, and build his own pizza. But Domino's argues that the Americans with Disabilities act, the Ada, pre-dates the introduction of websites that was passed in nineteen-ninety, and that in any case making its website accessible would place an undue burden on the company. Guillermo lost his case, but then won on appeal in a federal court. But now Domino's Pizza says that because lower courts can't agree on the online responsibilities of companies, the US Supreme court must provide some clarity. Quartz journalist Ephrat Livni gives us the facts of the case, and Chris Danielsen from the US National Foundation for the Blind explains why this case is so important at this particular point in time. Presenter: Peter White Producer: Lee Kumutat