 Diodorus Cronus (late 4th – early 3rd centuries B.C.E.) had an argument for fatalism, known as “The Master Argument”. Its conclusion was, “the possible is that which either is or will be”. We know the premisses but, unfortunately we do not know the intermediate steps. The premisses were (1) “Everything that is past and true is necessary”, (2) “The impossible does not follow from the possible” (Kneale and Kneale 1962, 119).