“Yes.” “If things are correctly called both, can they be both without being two?” “They cannot.” “And if things are two, must not each of them be one?” “Certainly.” “Then since the units of these pairs are together two, each must be individually one.” “That is clear.” “But if each of them is one, by the addition of any sort of one to any pair whatsoever the total becomes three?” “Yes.” “And three is an odd number, and two is even?” “Of course.”