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16'Tis all in pieces (separate RFs and CFs), all coherence goneBehavioral and Brain Sciences 20 (4): 693-694. 1997.We argue that the separation between CF (contextual field) and RF (receptive field) in relation to the NMDA (N-methyl-D-aspartate) system is empirically questionable and that it is functionally unnecessary. In addition, the proposed suppression of unexpected information will in many cases be counterproductive.