src/FOL/ROOT.ML

--- a/src/FOL/ROOT.ML	Wed Nov 12 16:28:53 1997 +0100
+++ b/src/FOL/ROOT.ML	Wed Nov 12 18:58:50 1997 +0100
@@ -34,6 +34,8 @@
   val rev_mp = rev_mp
   val subst = subst
   val sym = sym
+  val thin_refl = prove_goal IFOL.thy 
+		  "!!X. [|x=x; PROP W|] ==> PROP W" (K [atac 1]);
   end;
 
 structure Hypsubst = HypsubstFun(Hypsubst_Data);