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Published online by Cambridge University Press: 01 October 2008
Christiansen & Chater (C&C) suggest that language is itself an evolutionary system, and that natural languages “evolve” to be easy to learn and process. The tight economy of the world's case-marking systems lends support to this hypothesis. Only two major case systems occur, cross-linguistically, and noun phrases are seldom overtly case-marked wherever zero-marking would be functionally practical.