... the mental state of a person at one spe-cific moment in time can be encoded by a vector v of numerical values; one might, e.g., think of thelevel of excitation of neurons. Then, an externalstimulus ... integra-tion of symbolic and distributional approaches,we propose a Compositional Matrix-Space Model(CMSM) which employs matrices instead of vec-tors and makes use of matrix multiplication as the one ... In Section 3, we give a for-mal account of the concept of compositionality,introduce our model, and argue for the plausibil-ity of CMSMs in the light of structural and cogni-tive considerations....