known, and what is the habit which recognises them, is manifest hence to those who have previously doubted it.
That it is then impossible to have scientific knowledge through demonstration, without a knowledge of first immediate principles, has been elucidated before, still some one may doubt the knowledge of immediate principles, both whether it is the same or not the same, also whether there is a science of each or not, or a science of one, but a different kind (of science) of another, and whether non-inherent habits are ingenerated, or when inherent are latent. If then, indeed, we possess them, it is absurd, for it happens that it (the principle) escapes those who have a more accurate knowledge than demonstration, but if, not having them before, we acquire them, how can we know and learn without pre-existent knowledge? for this is impossible, as we said also in the case of demonstration. It is evident then, that they can neither be possessed, nor ingenerated in the ignorant, and in those who
