Our understanding of malapropism is a phenomenon that cries out for explanation, and we here use this phenomenon as a test case to evaluate the plausibility not just of different versions of Integrationism but also of the ‘Language of Thought’ hypothesis and a rival Dynamical Systems approach to modelling the workings of the mind. The verdict: The Roy Harris version of Integrationism (which overlaps interestingly with some views of the philosopher Donald Davidson) is extravagant and implausible and does not cut the mustard. The ‘Language of Thought’ hypothesis is put under severe strain. The Dynamical Systems approach which incorporates the ‘Extended Mind’ hypothesis, sits comfortably with the plausible version of Integrationism that is found in the late writings of Ludwig Wittgenstein.