In view of the law which we evolved by our analysis of pure reason and which showed that all understanding, all thought, is based on some perceptible object, on some quantity of sense perceptions, it is evident that everything distinguished by our faculty of distinction is a certain quantity and that, therefore, all distinctions are only quantitative, not absolute, only graduated, not irreconcilable. Even the difference between the reasonable and the unreasonable, or in other words between that which is momentarily or individually reasonable and that which is generally reasonable, is merely a quantitative distinction, like all others, so that the unreasonable may be conditionally reasonable, and nothing is unreasonable but that which is supposed to be unconditionally reasonable. If we understand that reason requires some perceptible object, some perceptible standard, then we shall no longer try to understand the absolutely reasonable, the purely reasonable. We shall then limit ourselves to look for the reasonable, as for all other things, in concrete objects. The definite, accurate, certain, uniform result of some understanding depends on the definite formulation of the task, on the accurate limitation of the perceptible quantity which is to be understood. If a certain moment, a certain person, a certain class, a certain nation are given and at the same time an essential need, a general and predominating purpose, then the question regarding the reasonable or suitable is easily answered. It is true that we may also know something of things which are generally reasonable for mankind in the aggregate, but in that case our standard must be abstract mankind instead of some concrete part of it. Science may study the anatomical structure of some concrete body as well as the general type of the human body, but this again it can do only when it supplies the faculty of understanding with general instead of individual material. If science divides the whole human race into four or five races, by establishing a certain standard of physiognomy, and later on discovers some individuals or tribes whose characters are so peculiar and rare that they cannot be classed under any of the established races, the existence of such exceptions is not a crime against the physical order of the world, but merely a proof of the inadequacy of our scientific classification. If, on the other hand, some conventional mode of thought considers a certain action as universally reasonable or unreasonable and then encounters opposition in actual life, convention fancies itself exempt from the work of understanding and assumes to deny civic rights in the moral order of the world to its opponents. Instead of realizing the limited applicability of its rules by the existence of opposing practices, convention seeks to establish an absolute applicability of its rules by simply ignoring the cause of the opposition. This is a dogmatic