Prove that both and Ø are independent of every other event A include in . Solution every person is different, for some it works, for .... ? | x /? S} of all elements of ? that do not belong to S, and is denoted by Sc. ... is the set of all elements that belong to both S and T, and is denoted by S ? T. Thus, .... ? and its complement, the empty set Ø, may qualify as an event..