doc-src/Tutorial/Misc/Defs.thy

added 'declare' command;
moved tactic emulations;
tuned;
renamed "res_inst_tac' etc. to 'rule_tac' etc.;
tuned;

Defs = Types +
consts nand, exor :: gate
defs nand_def "nand A B == ~(A & B)"
     exor_def "exor A B == A & ~B | ~A & B"
end