premise: A family is playing on the beach with their dog. hypothesis: a family sitting at the dinner table enjoying, what use to be, Fido.
contradiction: A group of people 'playing on a beach with their dog' would be outside and on their feet, and the dog could be assumed to be alive; while people 'sitting at a dinner table enjoying, what use to be, Fido' are inside, not on their feet, and Fido is presumably dead.