src/FOL/fol.thy
author wenzelm
Wed, 18 Aug 1999 20:44:07 +0200
changeset 7269 8aa45a40c87a
parent 0 a5a9c433f639
permissions -rw-r--r--
assume/presume: and_list1;

FOL = IFOL +
rules
classical "(~P ==> P) ==> P"
end