Duhknow

Duhknow: exclamation. This is an interjection used in a very specific situation. It is applicable, when one is undergoing a psychological test or experiment, where one is being presented with information and has to decide if it is something one 'knows' or one 'remembers'. If the answer is quite obviously that it is something one 'knows', then shouting Duhknow loudly and passionately is an appropriate response that definitely won't annoy the experimenter.