temporarily disable "ext" rule helpers until Metis supports them (and until they are properly evaluated)
--- a/src/HOL/Tools/ATP/atp_problem_generate.ML Wed May 16 18:16:51 2012 +0200
+++ b/src/HOL/Tools/ATP/atp_problem_generate.ML Wed May 16 18:16:51 2012 +0200
@@ -1646,8 +1646,9 @@
(("COMBC", false), @{thms Meson.COMBC_def}),
(("COMBS", false), @{thms Meson.COMBS_def}),
((predicator_name, false), [not_ffalse, ftrue]),
- (* FIXME: Metis doesn't like existentials in helpers *)
+(* FIXME: Metis doesn't like existentials in helpers
((app_op_name, true), [@{lemma "EX x. ~ f x = g x | f = g" by blast}]),
+*)
(("fFalse", false), [not_ffalse]),
(("fFalse", true), @{thms True_or_False}),
(("fTrue", false), [ftrue]),