formulas(sos). all x (Object(x) -> ((exists d (Point(d) & Ex1At(A,x,d))) -> (all d (Point(d) -> Ex1At(A,x,d))))). all x all F ((Object(x) & Property(F)) -> ((exists d (Point(d) & EncAt(x,F,d))) -> (all d (Point(d) -> EncAt(x,F,d))))). all x all d ((Object(x) & Point(d)) -> (WorldAt(x,d) <-> (SituationAt(x,d) & (exists d2 (Point(d2) & (all p (Proposition(p) -> (TrueInAt(p,x,d2) <-> True(p,d2))))))))). all p all x all d ((Object(x) & Proposition(p) & Point(d)) -> (TrueInAt(p,x,d) <-> EncpAt(x,p,d))). all x all d ((Object(x) & Point(d)) -> (SituationAt(x,d) <-> (Ex1At(A,x,d) & (all F (Property(F) -> (EncAt(x,F,d) -> (exists p (Proposition(p) & F=VAC(p))))))))). all x all p all d ((Object(x) & Proposition(p) & Point(d)) -> (EncpAt(x,p,d) <-> (exists F (Property(F) & F=VAC(p) & EncAt(x,F,d))))). end_of_list.