A player at a poker table I was at ordered a hot chocolate. It came out with a big heap of whipped cream on top and I think there was something in the ridges of the whipped cream (maybe chocolate flakes or sprinkles). There was enough whipped cream on top that you couldn't see the top of the hot chocolate. Before the player could take a sip of his drink and determine if it was too hot or just the right temperature or if it was too sweet or not, a second player commented, "That looks good" and he ordered a hot chocolate for himself.
That second player judged the hot chocolate solely by the look of the whipped cream and a thought occurred to me: