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1 files changed, 5 insertions, 2 deletions
diff --git a/docs/vm.org b/docs/vm.org
index a51b85a..d678acd 100644
--- a/docs/vm.org
+++ b/docs/vm.org
@@ -106,8 +106,11 @@ engine decides entailment algebraically. Every natural is at least
zero: proven. Not every integer is: refuted, and the refutation is
backed by a concrete counterexample. Every integer is a rational:
proven, which is decision 12's subtype inclusion decided
-symbolically. A universal outside that fragment is a non total plan,
-rejected, as decision 10 requires.
+symbolically. The unit identities of the numeric relations discharge
+too: =[Plus left: X right: 0 result: X]= holds over all integers by
+the algebra of =Plus=, in the flat membership form of decision 14,
+and fails over strings, which do not add. A universal outside that
+fragment is a non total plan, rejected, as decision 10 requires.
* Membership criteria as domains