Question

which kind of proof requires you to prove that all but one of a set of possible alternatives are false? a. direct proof. b. elementary proof. c. indirect proof. d. scientific proof.

Answer 1

will I think it is A.direct proof. plz tell me if I am right

Answer 2

The kind of proof that requires you to prove that all but one of a set of possible alternatives are false is

C. indirect proof.