--- a/thys/uncomputable.thy Fri Feb 01 14:54:47 2013 +0000
+++ b/thys/uncomputable.thy Sun Feb 03 12:24:00 2013 +0000
@@ -1154,6 +1154,7 @@
unfolding Hoare_halt_def Hoare_unhalt_def
by (auto simp add: tape_of_nl_abv)
qed
+
text {*
@{text "False"} can finally derived.