src/FOL/fol.thy
author wenzelm
Sat, 01 Sep 2001 00:20:22 +0200
changeset 11545 0b56d9c90dcf
parent 0 a5a9c433f639
permissions -rw-r--r--
final proofs := 0;

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