No compensation is allowed for an injury or death due to the employee's knowingly self-inflicted injury, his intoxication, his commission of an offense, his knowing failure to use a safety appliance, his knowing failure to obey a reasonable written or printed rule of the employer which has been posted in a conspicuous position in the place of work, or his knowing failure to perform any statutory duty. The burden of proof is on the defendant.
IC 22-3-2-8