The second period is the renewed beginning, as the reappropriation of the Cartesian discovery, the fundamental demand of apodicticity; and in this beginning, through the changed historical situation (to which all the fateful developments and philosophies of the first epoch belong), there arise forces of motivation, a radical thinking through of the genuine and imperishable sense of apodicticity (apodicticity as a fundamental problem), the exhibiting of the true method of an apodictically grounded and apodictically progressing philosophy; and included within this is the discovery of the radical contrast between what is usually called apodictic knowledge and