 The essential characteristic of the logogene model of lexical access is that words are recognized by a set of logogenes, one set corresponding to each word in the language. Each logogene is sensitive to perceptual, that is, auditory and visual, and to semantic input. Logogenes have activation values or thresholds. Whenever a logogene has collected enough evidence, that is, as soon as a certain overall activation value is reached, the logogene fires and the word is recognized. Logogenes do not operate in isolation. The input cat, for example, would, on the basis of phonetic similarity, also activate the logogene for cot. Likewise, dog would activate its voiceless counterpart, dock. Yet dog is more frequent. Its threshold is lower and it fires faster. In the case of the African animal zebra, we would encounter a simultaneous activation of the horse logogene. And since zebra is not as common as horse, the threshold of the horse logogene is lower. Sometimes items have several meanings. Take port as an example. However, since port, referring to a port town, is more frequent than the Portuguese wine, its logogene fires faster.