The scholarship on the extent of the Nahuatl writing system makes something of a sense-reference error. There are a number of occurrences in which the symbols encode a verb, three in the present tense and one in the past tense. The context of the use of calendar systems and written language in the Aztec empire is roughly described. I suggest that a new typology for is needed in order to fully account for Mesoamerican writing systems and to put to rest the idea that alphabetic orthographies are superior to other full systems. I cite neurolinguistic articles in support of this argument and suggest an evolutionary typology based on Gould's theory of Exaptation paired with the typology outlined by Justeson in his "Origins of Mesoamerican Writing" article.