‘Let me refresh your memory; there is no harm in going over what you have heard several times. Five will not admit the character of evenness, nor will ten—its double—admit that of oddness. Now, this latter term is actually itself an opposite of another term, but none the less it will not admit the character of oddness; no more indeed will 3/2 or the other terms of this series—the ‘half’—admit the character of wholeness, nor yet will ⅓ and all the other terms of that series.’