features with the distance relationship among landmarks49. Similarly to the embodiment of the spatial relations among objects in the cognitive map1, models of semantic relatedness use a metric based on topological similarity and a neuronal network equivalent of vector distance for defining relationships among words49,50, which can be ably assisted by the pattern completion and separation mechanisms of the entorhinal cortex–hippocampus system38,51 in partnership with the neocortex19–21.
