  The time dependence of the survival probability of an opinion in a closed
community has been investigated in accordance with social temperature by using
the Kawasaki-exchange dynamics based on previous study in Ref. [1]. It is shown
that the survival probability of opinion decays with stretched exponential law
consistent with previous static model. However, the crossover regime in the
decay of the survival probability has been observed in this dynamic model
unlike previous model. The decay characteristics of both two regimes obey to
stretched exponential.
