One aspect of Experiment 4 is highly artificial, however. In the world, lexical dimensions are tied closely to the massive overlap of adjective categories. Far from providing redundant information about category identity, lexical input (``what color is it?'') functions to pick out one label true of the specific object (e.g., red) from a large set of other labels also true of that same object ( big, furry, wet, dog). In Experiment 5, we investigated the effect of category overlap in the context of lexical dimensions.