arith_tac now copes with propositional reasoning as well.
1.1 --- a/src/HOL/simpdata.ML Wed Mar 07 18:35:27 2001 +0100
1.2 +++ b/src/HOL/simpdata.ML Fri Mar 09 19:05:48 2001 +0100
1.3 @@ -487,7 +487,8 @@
1.4 REPEAT(eresolve_tac [conjE, exE] 1 ORELSE
1.5 filter_prems_tac test 1 ORELSE
1.6 etac disjE 1) THEN
1.7 - ref_tac 1;
1.8 + ((etac notE 1 THEN eq_assume_tac 1) ORELSE
1.9 + ref_tac 1);
1.10 in EVERY'[TRY o filter_prems_tac test,
1.11 DETERM o REPEAT o etac rev_mp, prep_tac, rtac ccontr, prem_nnf_tac,
1.12 SELECT_GOAL (DEPTH_SOLVE refute_prems_tac)]