From 5d967951eb0b08c36ee59f70d7f4cca37b0ca72b Mon Sep 17 00:00:00 2001 From: Marcos Magueta Date: Sat, 11 Jul 2026 22:13:33 -0300 Subject: world relation as the universe for scoped negation --- lib/builtin.ml | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/builtin.ml') diff --git a/lib/builtin.ml b/lib/builtin.ml index 694b688..082471b 100644 --- a/lib/builtin.ml +++ b/lib/builtin.ml @@ -13,6 +13,7 @@ let upper_l = forced_label "upper" let names = [ "True"; + "World"; "Integer"; "Natural"; "Rational"; @@ -143,6 +144,9 @@ let between subst bindings = let run subst name bindings = match name with | "True" -> Some (yes subst) + (* The universe: true of every tuple, per the specification. Its + role is to scope denial, as in [World] :not [Adult person: P]. *) + | "World" -> Some (yes subst) | "Integer" -> Some (domain_check subst bindings (function -- cgit v1.2.3