Molly is confused about which washing machine she should buy—a front-load machine or a top-load machine. Peter, a salesperson at an electronics store, asked about her budget and how many articles of clothing she intends to wash each day on an average. Considering her specific requirements as well as the amount of money she is willing to spend, he suggests that Molly buy a top-load washing machine. In this scenario, it is evident that Peter possesses sound ________.