Different attributes of the same object, such as solidity and whiteness, fulfill one another. This proposition was made by the later Mohist scholars. When you look at a solid white stone, you can only see its color, without knowing it is solid; when you touch the stone, you can only feel its solidity, without knowing it is white. Though solidness and whiteness cannot be perceived by a single sensory organ, the two attributes cannot be separated from each other, because they are possessed by the same stone. Later Mohist scholars used the example of the solid white stone to explain that attributes of any single object, though perceivable through different organs, are intimately associated with each other.

Though it is only possible to see a white stone without knowing it is solid, the two attributes of whiteness and solidness must fulfill each other. (Mozi)