If you time traveled back to 1972 to get good beef steak tomatoes, and you brought your Ipod with you, would all the songs created after that time point disappear? If it didn’t, could you take credit for those songs? Would you take credit for “Hungry Like The Wolf” or “Karma Chameleon”? More importantly, why are those songs on your Ipod? Regardless, don’t forget to bring your charger.