 A chunking strategy has also been applied to capture the inferential mechanism underlying some theories in science and mathematics. In mathematics, the best available theory concerning infinitesimals was inconsistent. In the original calculus of Leibniz, in the calculation of a derivative infinitesimals had to be both zero and non-zero. (Cf. Colyvan 2012, chapter 7. Newton used ‘fluxions’, which play a similar role.) In order to capture the inference mechanism underlying this (and Bohr’s theory of the atom), we need to add to the chunking a mechanism that allows a limited amount of information to flow between the consistent fragments of these inconsistent but non-trivial theories. That is, certain information from one chunk may permeate into other chunks. The inference procedure underlying the theories must be Chunk and Permeate.