«النارنج حلو حامض»
The bitter orange is sweet and sour.
The book uses this to illustrate how distinct qualities may belong to an object in different respects, while an argument wrongly treats them as predicated in precisely the same respect.
A bitter orange may combine sweetness and sourness in its overall taste without every constituent independently possessing both pure qualities. The predication of the whole must be distinguished from what is claimed of its parts.