When is it permissible to take the necessary implication of statements, and when is it not permissible?

Question:
He says: Honorable Shaykh, may Allah grant you success. We hear from some students of knowledge that the necessary implication of statements is not to be taken in refutations and arguments. Yes. We hear from some students of knowledge that the necessary implication of statements is not to be taken in refutations and arguments. So we ask you, Honorable Shaykh, to clarify when it is permissible to take the necessary implication of statements, and when it is not permissible to do so?

Answer:
As for this, Ibn al-Qayyim has detailed it in *al-Nuniyyah*, as has passed to you. The necessary implication of the speech of Allah and the speech of the Messenger is truth; the necessary implication of the speech of the Messenger and the speech of Allah is truth, without doubt. As for the necessary implication of the statements of people who exercise independent legal reasoning, if the speaker knows what necessarily follows from his statement, then he has intended it, whether it is true or false.
But if he does not know that this necessarily follows from his statement, then we do not bind him with what he does not know. So there is a distinction in the issue: Is the necessary implication of a statement a statement of the person? Does what necessarily follows from your statement become a statement of yours? We say: If you know the necessary implication, then it binds you, whether it is true or false. But if you do not know that this necessarily follows from your statement, then we do not bind you with it, and you were not aware of it.
As for the necessary implication of the Book and the Sunnah, it is truth. The necessary implication of truth is truth, without doubt. Yes.