\forall (g: G).(\forall (c1: C).(\forall (e1: C).((clear c1 e1) \to (\forall
(c2: C).((csubc g c1 c2) \to (ex2 C (\lambda (e2: C).(clear c2 e2)) (\lambda
(e2: C).(csubc g e1 e2))))))))
\forall (g: G).(\forall (c1: C).(\forall (e1: C).((clear c1 e1) \to (\forall
(c2: C).((csubc g c1 c2) \to (ex2 C (\lambda (e2: C).(clear c2 e2)) (\lambda
(e2: C).(csubc g e1 e2))))))))