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Dialogue language'' in the form of voice or sign with different modalities has many common functions that reduce the mental burden of the participants in a dialogue.We investigated the factors underlying dialogue languages.We focused on the constraints such as the ''requirements'' required by the ''dialogue language'' and the ''implementation conditions'' consisting of the guarantee of survival as a living being and the realistic constraints of physical resources.As a result, we particularly found that there are large restrictions due to energy saving and real-time performance.
A Sat, study studied this question.