The dual and singular case-affixes are employed severally in the sense of duality and unity.,
This is also clear. When duality is to be expressed, a dual case-affix should be employed, and in the case of unit, the singular case-affix. Thus ब्राह्मणौ पचतः the two Brahmins cook. ब्राह्मणः पचति the Brahmin cooks.,