Borrow another scale & check it against that?
How to confuse a physicist?
Give him 2 thermometers & ask him the exact temperature.
How to confuse a photographer?
Give him 2 light meters & ask him the exact exposure.
How to confuse a shooter?
Give him 2 targets & ask him for the range.
How to confuse a reloader?
give him a set of dippers & a scale & ask him for the exact charge weight.
