Is it possible for the Word of God not to conform to reality out of mockery, as Abraham (peace be upon him) did when he said, "Rather, the chief of them did it?"

What the questioner wrote is not without offensiveness and impoliteness towards Allah. It is self-evident that our Lord, Exalted and Glorified be He, is far removed from uttering anything contrary to reality. The issue of the occurrence of figurative language (majāz) in the Qur'an is well-known, and the majority of scholars agree that it does occur in the Qur'an. Figurative styles such as "sarcasm" (tahakkum) and "allusion" (taʿrīḍ) are not lies, which is informing of something contrary to reality. The statement of Abraham, peace be upon him: "Rather, this — the largest of them — did it. So ask them, if they can speak" (21:63), is not a lie in its essence, even though it appears similar to one externally, which is why it was called a lie in some hadiths. Ibn al-Qayyim says: We do not concede that lying can be good; rather, it is always ugly. What is good is allusion (taʿrīḍ) and equivocation (tawriya), like [Abraham's statements]: "This is my sister" and "Indeed, I am sick." Speech has two relations: a relation to the speaker and his intention, and a relation to the listener and his understanding. If the speaker intends a meaning that conforms to reality, and intends to obscure it from the مخاطب (addressed person) and make him understand something contrary to what he intended, then it is truth with respect to his intention, [but] a lie with respect to his making him understand. From this category are tawriya and maʿārīḍ, and it is in this sense that Abraham, peace be upon him, referred to them as lies.