Abstract
In a series of presentations at Sainte-Anne Hospital, published in English under the title _Talking to Brick Walls_, Lacan offers one of the few explicit references to Bataille in his _œuvre_. He interposes a stark disagreement between himself and Bataille on the status of possible knowledge regarding ontological questions. Lacan reads Bataille as a mystic who proposes that the pursuit of knowledge is a futile task and that knowledge of being is _only _possible _per viam negativam_. In order to advance this reading, Lacan emphasises Bataille’s fixation with “nonknowledge.” At first glance, one can understand why Lacan identifies him as a mystic, and many commentators on Bataille’s writings offer similar reading; however, this ignores subtle nuances of Bataille’s arguments regarding what he calls “inner experience.” More crucially, it ignores his explicit rejection of mysticism on the very basis of the knowledge that results from nonknowledge. This comparison frames a problem for fundamental ontology, of which I hope to elaborate only one aspect: The incompleteness of thought implies a non-relation between thought and being, and we can have a knowledge about this non-relation through an analysis of the limit as phantasmatic and structural rather than as real.