So a dog in a recent VS show, was marking indoors, especially new incoming items left on the floor. The strategy used was twofold, take the male dogs out regular to mark outdoors, depriving them of payload for use indoors, setting them up for success, probaby negative-punishment in relation to indoor marking. But secondly, a positive-punishment of a sharp surprising verbal reprimand was used, when the dog cocked it's leg with intention to mark, delivered from hiding with a lure of new items placed in suitable spot on floor. Thus the rules for effective Punishment were met, and it indeed worked. Could a purely positive-reinforcement method have been used in place?