If there is anything which clearly shows the lamentable condition of philosophy as a science in these our days, it is that such occurrences can take place. If anybody were to speak about mathematics, natural sciences, or any other science, in a manner which would indicate beyond a doubt his complete ignorance concerning the first principles of such a science, he would be at once sent back to the school from which he ran away too soon. But in philosophy it is not to be thus. If in philosophy a man shows in the same manner his complete ignorance, we are, with many bows and compliments to the sharp-sighted man, to give him publicly that private schooling which he so sadly needs, and without betraying the least smile or gesture of disgust. Have, then, the philosophers in two thousand years made clear not a single proposition which might now be considered as established for that science without further proof? If there is such a proposition, it is certainly that of the distinction of logic, as a purely formal science, from real philosophy or metaphysics. But what is really the true meaning of this terrible logical proposition of contradiction which is to crush at one stroke our whole system? As far as I know, simply this: _if_ a conception is already determined by a certain characteristic, then it must not be determined by another opposite characteristic. But by what characteristic the conception is originally to be characterized, this logical theorem does not say, nor can say, for it presupposes the original determination, and is applicable only in so far as that is presupposed. Concerning the original determination another science will have to decide. These wise men tell us that it is _contradictory_ not to determine a conception by the predicate of actual being. Yet how can this be contradictory, unless the conception has first been thus determined by the predicate of actual being, and has then had that predicate denied to it? But who authorized them to determine the conception by that predicate? Do not these adepts in logic perceive that they postulate their principle, and turn around in an evident circle? Whether there really be a conception, which is originally—by the laws of the synthetizing, not of the merely analyzing reason—_not determined by that predicate of actual being_, this they will have to go and learn from contemplation; logic only warns them against afterwards again applying the same predicate to that conception; of course also, in the same respect, in which they have denied the determinability of the conception by that predicate.