The paper identifies and defines augmentative and alternative communication, a new sub-discipline in applied linguistics whose primary parametre is linguistic competence whereas the secondary parameter is the phenomenon of speech inability and speech non-occurrence.At the same time it has been proven dark red masquerade mask that linguistics of augmentative and alternative communication conducts primary, applied and implementation research having a hierarchical layout of scientific aims.It also enables to conduct a logopaedic analysis of mute and non-speaking persons.
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