 The domain of sense is necessarily subject to a fundamental fragility, capable of toppling over into nonsense: the ground gives way to a groundlessness, a sans-fond. The reason for this is clear. Sense is never a principle or an origin; rather, it is an effect, it is produced, and it is produced out of elements that do not, in themselves, have a sense. Sense, in other words, has a determinate relation with nonsense. Deleuze, however, distinguishes between two very different types of nonsense. The first is that of Lewis Carroll, who remains at the surface of sense and, like children, makes use of the non-signifying elements of language in order to construct the portmanteau words (snark = shark + snake; frumious = furious + fuming) and nonsensical phrases (“’Twas brillig, and the slithy toves did gyre and gimble in the wabe”) that populate his writing. If Logic of Sense is in part a reading of Carroll’s work, it is because no one knew better than Carroll about the conditions for the production of sense, which Deleuze elucidates in detail: the extraction of differential elements or pure event, their organization in multiple series, and most importantly, the aleatory point or paradoxical element that links the series (the ideal “quasi-cause” that produces the effect of sense out of nonsense).