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They said: As for your sixth proof—namely (1) that when no muḥallil (neutral third participant) is present and both contestants put up a stake, each of them hovers between gain and loss, which is the very definition of gambling—many arguments already advanced, to which you have offered no reply, invalidate this claim. They show that if the contract without a muḥallil is gambling, then with a muḥallil it is even more deserving to be called gambling; whereas if it is not gambling with a muḥallil (2), then without him it is all the more clearly not gambling. It is impossible for it to be gambling (3) in one of the two cases but not in the other, and every distinction or rationale you propose actually argues more strongly against requiring a muḥallil than for requiring one. We have already clarified this; if you have an answer, present it—there is none.
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As for your statement: “Had there been nothing in this matter except that it is the opinion of the most learned of the Successors, Saʿīd ibn al-Musayyab—indeed, the position of Abū Ḥanīfah is that when a Successor lived contemporaneously with the Companions …” (4)