Say: "(As against what you argue) God’s is the final, conclusive argument. And had He so willed (and compelled you act in a certain way, rather than letting you associate partners with Him and make unlawful what He has made lawful) He would have guided you all together to the truth
Say, "The most Powerful Reasoning, the Final Evidence belongs to Allah. If He Willed, He could have made all of you innately guided (like other creation who spontaneously follow Divine Laws (16:49), (41:11))."
Say: "In contrast to your position, Allah’s argument is conclusive; if it had been His will He could indeed have guided you all."
Dr. Munir Munshey
Say, "Allah has the (final and) infallable argument. Had He so willed, He could surely have guided all of you."
Dr. Kamal Omar
Say: “So the perfection for argument is restricted to Allah (Alone). So had He willed, indeed He would have guided you all (but He rather keeps full regard for the liberty and choice which He kept in your nature as a human creation).
Say: "With Allah is the perfect proof and argument, (i.e. the Oneness of Allah, the sending of His Messengers and His Holy Books, etc. to mankind), had He so willed, He would indeed have guided you all."
Say, “To Allah belongs the definite proof... If He had willed, he would surely have guided all of you.”
Sayyed Abbas Sadr-Ameli
Say: ' Then to Allah (alone) belongs the conclusive argument. Had He wished, He would have surely guided you all aright'
Al-muntakhab fi tafsir al-Qur'an al-Karim
Say to them: "The final and authoritative proof and pronouncement lie in the hands of Allah; had He willed, He would have guided you all to His path of righteousness"