language is defined by a unique grammar, every culture and society is also defined by a unique visual grammar. This latter is usually much less obvious even to the "natives" of a culture. One reason for this lack of transparency of visual grammar is that it is not explicitly taught in the same way that linguistic grammar is. Another reason that the visual grammar of any society is less obvious to its members is that there is not necessarily a single correct reading. Linguistic grammar is a cultural phenomenon that exhibits a high level of consensus. As such, it serves as a model for those aspects of culture over which the individual has very little control and yet are individually highly significant.

Individuals may vary in their choice of vocabulary; however, they rarely disagree fundamentally on how a sentence should be constructed. Another way of expressing this idea is that...
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