There's a lot of science behind the time-honored tip.Whiskey aficionados are known for having strong opinions about, well, most things. They quibble over the concept of terroir in whiskey, turn their nose at bottlings that are chill-filtered, and debate whether age is indicative of quality. The list of contentious whiskey-related subjects is seemingly endless, but one tasting-related topic that divides enthusiasts is whether or not to add water to a glass of whiskey to open it up, and if one decides to do so, where that water should be sourced from, as well as how pure it should be. Before...