The doctor's statement contradicting the hadith of the fly

Question:
And he says: Peace be upon you, and Allah's mercy and blessings. If one of the doctors says that immersing the merchandise in it after it has been fully immersed in it contains a disease, then I refute this hadith. What is the ruling on that?

Answer:
We say that this is a false statement, and the doctor's statement is rejected. If the doctor says that the disease remains even if the fly is immersed in it, this is a statement that contradicts the words of the Messenger of Allah (peace and blessings be upon him). The words of the Messenger (peace and blessings be upon him) are protected from error, while the doctor's words are based on opinion and are subject to error. Therefore, we prioritize the words of the Messenger of Allah (peace and blessings be upon him) over the words of everyone, because the Messenger of Allah (peace and blessings be upon him) does not speak from desire. This doctor is ignorant, and he may have desires; he may be one of the hypocrites, or one of the open sinners, or one of the Christians, or one of the Jews, or one of the ignorant among the Muslims. His statement is not accepted in any case. The statement of anyone who contradicts the words of the Messenger of Allah (peace and blessings be upon him) is never accepted, no matter who he is, even if he is the greatest of doctors. We say that the words of the Messenger of Allah (peace and blessings be upon him) are the truth, and your contradiction of them is proof of the falsity of your statement. Yes.