# HG changeset patch
# User paulson
# Date 861610471 -7200
# Node ID 86aaab39ebb170db762749a2db100c050f256e19
# Parent  2a311f90747cd4cd195fb286a4497049ece092e9
Without the type constraint, the inner equality was NOT a biconditional...

diff -r 2a311f90747c -r 86aaab39ebb1 src/HOL/ex/cla.ML
--- a/src/HOL/ex/cla.ML	Mon Apr 21 10:13:47 1997 +0200
+++ b/src/HOL/ex/cla.ML	Mon Apr 21 10:14:31 1997 +0200
@@ -18,7 +18,7 @@
 
 (*If and only if*)
 
-goal HOL.thy "(P=Q) = (Q=P::bool)";
+goal HOL.thy "(P=Q) = (Q = (P::bool))";
 by (Blast_tac 1);
 result();