  In this paper, we introduce $\textit{partial}$ dependency modality
$\mathcal{D}$ into epistemic logic so as to reason about $\textit{partial}$
dependency relationship in Kripke models. The resulted dependence epistemic
logic possesses decent expressivity and beautiful properties. Several
interesting examples are provided, which highlight this logic's practical
usage. The logic's bisimulation is then discussed, and we give a sound and
strongly complete axiomatization for a sub-language of the logic.
