Once again, it is convenient to represent the absolute term <math>\mathrm{b} = \text{black}\!</math> by means the corresponding idempotent rheme, <math>\mathrm{b,} = \text{black that is}\,\underline{~~~~}.</math> In this way it can be taken as a selective from the universe of discourse. | Once again, it is convenient to represent the absolute term <math>\mathrm{b} = \text{black}\!</math> by means the corresponding idempotent rheme, <math>\mathrm{b,} = \text{black that is}\,\underline{~~~~}.</math> In this way it can be taken as a selective from the universe of discourse. |