in recent times, as worked out by F. H. Bradley and B. Bosanquet, that every true logic must have an a priori and an a posteriori aspect. Nor have they let the matter go at that. They have not only made the general statement that every method must have an a priori as well as an a posteriori aspect, but they have also defined the nature of the a priori aspect of which they speak. They say that this a priori aspect of method is involved in the notion of eternality. Bosanquet stoutly maintains that,