%A Horst Dieter Steklis
%A Stevan Harnad
%J Origins and Evolution of Language and Speech
%T From hand to mouth: Some critical stages in the evolution of language
%X A theory of the evolution of lanaguage, beginning with bipedalism and lateralization, through instrumental and iconic gesture, to arcbitrary symbols, propositions and speech. The "translatability thesis" is also introduced, to the effect that all languages are intertranslatable (hence all can express any and every proposition).
%K language, evolution, lateralization, gesture, propositions, symbols, translatability, speech
%P 445-455
%E Stevan Harnad
%E Horst Dieter Steklis
%E Jane B. Lancaster
%D 1976
%I Annals of the New York Academy of Sciences 280
%L cogprints866

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