Ibn Rushd in his book (The Essential) invented this term in his statement of the truth of the apparent in terms of formulas; He said: (And among these words is what is said from the beginning of something, and it is more famous in the indication of it, then he will sometimes borrow for something else because it resembles the first sense, or some of them are replaced by some place; It was reported from the clues, which was carried on its first situation, and it is some of what they mean in this industry on the face ... If the clues indicate its borrowing or replacement, it is some of what is called in this industry.