Continuation of the explanation of the author's statement: "… if he prays, he is a Muslim by ruling…"

The Shaykh : Because we have now ruled that he is a Muslim, even if he says, "I have become a Muslim." Also, if he were to apostatize and say that he did so in jest, we would consider him an apostate. We consider him an apostate. What is the difference between considering him an apostate and the disbelief he had before he prayed? The disbelief he had before he praying is established upon him; its original state is established upon him. Now, his disbelief after he prayed, and we have ruled that he is a Muslim, is apostasy, and it is not established upon him. For this reason, we command him or invite him to return to Islam. If he refuses, we kill him. Before he prayed, he was a disbeliever, but he was left alone; it was not said to him, "Become a Muslim or we will kill you." This is the benefit of the author's statement: "he is a Muslim by ruling". But if he intended Islam through his prayer, and he testified and bore witness that Muhammad is the Messenger of Allah, then he is a Muslim in reality and by ruling.