$\forall$$T$:Type, $R$, $Q$:($T$$\rightarrow$$T$$\rightarrow\mathbb{P}$).
\\[0ex]($\forall$$x$, $y$:$T$. ($R$($x$,$y$)) $\Leftarrow\!\Rightarrow$ ($Q$($x$,$y$))) $\Rightarrow$ ($\forall$$x$, $y$:$T$. ($R$\^{}+($x$,$y$)) $\Leftarrow\!\Rightarrow$ ($Q$\^{}+($x$,$y$)))