Behold the insufficiency of the measuring cup! Though it may be hard at first, you'll thank yourself when you transition from volumetric measuring to weighing ingredients in your kitchen. Accurate, repeatable, reliable baking ahoy!
Any scientist worth her salt will tell you that the two most important factors in any experiment are consistency and reproducibility. Considering that every time we bake we are essentially conducting a science experiment, why wouldn’t we hold the same standards in the kitchen?