\begin{tabbing}
$\forall$\=${\it poss}$:(ES\{i\}$\rightarrow\mathbb{P}$\{i'\}), $R$:(possible{-}event\{i:l\}(${\it poss}$)$\rightarrow$possible{-}event\{i:l\}(${\it poss}$)$\rightarrow\mathbb{P}$\{i'\}),\+
\\[0ex]$P$:(possible{-}event\{i:l\}(${\it poss}$)$\rightarrow\mathbb{P}$\{i'\}), $e$:possible{-}event\{i:l\}(${\it poss}$).
\-\\[0ex]es{-}knows\{i:l\}(${\it poss}$; $R$; $P$; $e$) $\in$ $\mathbb{P}$\{i'\}
\end{tabbing}