§ 211. But there is at least one further starting-point, the one adopted by the most subtle and elaborate of all reconstructive philosophies. Logical necessities are as evidently real as bodies or selves. It is possible to define general types of inference, as well as compact and internally necessary systems such as those of mathematics. There is a perfectly distinguishable strain of pure rationality in the universe. Whether or not it be possible to conceive a pure rationality as self-subsistent, inasmuch as there are degrees it is at any rate possible to conceive of a maximum of rationality. But similarly there are degrees of moral goodness. It is possible to define with more or less exactness a morally perfect person, or an ideal moral community. Here again it may be impossible that pure and unalloyed goodness should constitute a universe of itself. But that a maximum of goodness, with all of the accessories which it might involve, should be thus self-subsistent, is quite conceivable. It is thus possible to define an absolute and perfect order, in which logical necessity, the interest of thought, or moral goodness, the interest of will, or both together, should be realized to the maximum. Absolutism conceives reality under the form of this ideal, and attempts to reconstruct experience accordingly. But is the prospect of success any better than in the cases of materialism and subjectivism? It is evident that the ideal of logical necessity is due to the fact that certain parts of knowledge approach it more closely than others. Thus mechanics contains more that is arbitrary than mathematics, and mathematics more than logic. Similarly, the theory of the evolution of the planetary system, in that it requires the assumption of particular distances and particular masses for the parts of the primeval nebula, is more arbitrary than rational dynamics. It is impossible, then, in view of the parts of knowledge which belong to the lower end of the scale of rationality, to regard reality as a whole as the maximum of rationality; for either a purely dynamical, a purely mathematical, or a purely logical, realm would be more rational. The similar disproof of the moral perfection of reality is so unmistakable as to require no elucidation. It is evident that even where natural necessities are not antagonistic to moral proprieties, they are at any rate indifferent to them. [Sidenote: Error and Evil Cannot be Reduced to the Ideal.]