The structural properties of discourse will correspond to the structural properties of human acts . The use of low discourse in communication may be evaluated as effective or ineffective by judging the relevance, accuracy, and completeness of the symbol in representing its topics. That is, talkers jointly produce parts of sentences or parts of the topic, and do so through approximations that home in on it until it is relevant, accurate, and complete as locally desired by the participants. In written communicative discourse such as textbook, or say, instructions that come with appliances, the relevance, and accuracy and completeness of the topical information are non-interactive and necessarily more formal and standard. Though attempts are made to be relevant, accurate, and complete, this goal is only partially achieved in particular instances.
Low discourse is acquired early in language development and is also suitable in man-machine systems.
A computer can have some limited conversational exchanges with people if it has a software capability for reasoning routines . These are specified argument sequences that copy argument sequences people use when explaining or justifying an opinion. For example, speech act routines always have their constituent argument logic. We may call sentences of this sort titles to indicate their characteristic expandibility into fuller statements and paragraphs. This is not the case with sentences that function as symbols , as with low-discourse.