Reconstruction of the infantile process of acquiring a language shows that in order to initially develop the object scheme, children must have an ability to maintain the intensity of their sensory stimulation and their own sense of synaesthesia. Such a somatic condition concedes children to acquire the object scheme from her/his subjective perspective. This becomes likely through the symptomatic relation that is made when children partition the undifferentiated senses as a whole. The next significant step in acquisition of a language is that children should synchronize their own object scheme with that of the existing language community; this sensible phenomenon requires mutual role change and change of perspective by children. In addition, autism research holds a significant meaning not only as a psychiatric study but also as a sound philosophical investigation. In particular, the logical reconstruction of language acquisition is used be restricted to normal linguistic condition and this attempt only explains half of the entire study of development of language. The logical reconstruction of language acquisition can be faultless only when the linguistic disorder is also philosophically understood.