 Possible World Justification Model A possible world  justification model for \(\mathsf{J}_{CS}\) is a structure  \(\mathcal{M} = \langle \mathcal{G} , \mathcal{R} , \mathcal{E} ,  \mathcal{V}\rangle\) satisfying all the conditions listed above, and  meeting Constant Specification \(CS\). 