The assertion, again, that non-knowledge as a positive entity is proved by Inference, also is groundless. But the inference was actually set forth!--True; but it was set forth badly. For the reason you employed for proving ajñâna is a so-called contradictory one (i.e. it proves the contrary of what it is meant to prove), in so far as it proves what is not desired and what is different from ajñâna (for what it proves is that there is a certain _knowledge_, viz. that all knowledge resting on valid means of proof has non-knowledge for its antecedent). (And with regard to this knowledge again we must ask whether it also has non- knowledge for its antecedent.) If the reason (relied on in all this argumentation) does not prove, in this case also, the antecedent existence of positive non-knowledge, it is too general (and hence not to be trusted in any case). If, on the other hand, it does prove antecedent non-knowledge, then this latter non-knowledge stands in the way of the non-knowledge (which you try to prove by inference) being an object of consciousness, and thus the whole supposition of ajñâna as an entity becomes useless. The proving instance, moreover, adduced by our opponent, has no proving power; for the light of a lamp does not possess the property of illumining things not illumined before. Everywhere illumining power belongs to knowledge only; there may be light, but if there is not also Knowledge there is no lighting up of objects. The senses also are only causes of the origination of knowledge, and possess no illumining power. The function of the light of the lamp on the other hand is a merely auxiliary one, in so far as it dispels the darkness antagonistic to the organ of sight which gives rise to knowledge; and it is only with a view to this auxiliary action that illumining power is conventionally ascribed to the lamp.--But in using the light of the lamp as a proving instance, we did not mean to maintain that it possesses illumining power equal to that of light; we introduced it merely with reference to the illumining power of knowledge, in so far as preceded by the removal of what obscures its object!--We refuse to accept this explanation. Illumining power does not only mean the dispelling of what is antagonistic to it, but also the defining of things, i.e. the rendering them capable of being objects of empirical thought and speech; and this belongs to knowledge only (not to the light of the lamp). If you allow the power of illumining what was not illumined, to auxiliary factors also, you must first of all allow it to the senses which are the most eminent factors of that kind; and as in their case there exists no different thing to be terminated by their activity, (i.e. nothing analogous to the ajñâna to be terminated by knowledge), this whole argumentation is beside the point.