hardness is a property of a material / an object and includes ordered values of malleable / rigid
hardness is multi_dimensional_quantity. hardness is tangible_physical_quantity. hardness is non_aspectual_quantity. hardness is quality. hardness is not quality. hardness is consistency. hardness is not tangible_physical_quantity. hardness is mechanical_property. hardness is not multi_dimensional_quantity. hardness is not mechanical_property.