"He used a knife for the piquant goulash. Can you discern what kind of pepper they used?" In the end it turns out that the two dwarfs grated a bench in the food.

Pien is composed of two 辛 hsin acrid, which formed an old radical read pien, meaning two guilty persons incriminating one another, with a dot and a line between, and originally meant to decide, hence to discriminate.