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-rw-r--r--spartan/theories/Identity.thy3
1 files changed, 2 insertions, 1 deletions
diff --git a/spartan/theories/Identity.thy b/spartan/theories/Identity.thy
index 01bea46..3a982f6 100644
--- a/spartan/theories/Identity.thy
+++ b/spartan/theories/Identity.thy
@@ -41,7 +41,8 @@ axiomatization where
lemmas
[intros] = IdF IdI and
[elims "?p" "?a" "?b"] = IdE and
- [comps] = Id_comp
+ [comps] = Id_comp and
+ [refl] = IdI
section \<open>Path induction\<close>