debator, you write in post 268: "
18 I will raise up for them a prophet like you from among their brothers; I will put my words in his mouth, and he will tell them everything I command him. 19 If anyone does not listen to my words that the prophet speaks in my name, I myself will call him to account. 20 But a prophet who presumes to speak in my name anything I have not commanded him to say, or a prophet who speaks in the name of other gods, must be put to death."
21 You may say to yourselves, "How can we know when a message has not been spoken by the LORD ?" 22 If what a prophet proclaims in the name of Jehovah does not take place or come true, that is a message Jehovah has not spoken. That prophet has spoken presumptuously. Do not be afraid of him.
The context for all these scriptures is when God speaks words to the prophets directly. This is the creteria for inspiration in the bible so they knew which books were inspired or what was prophetic utterances. Hense why the Bible is called "God's word".
My response: Please re-read the quote from the 1959 Watchtower:
13 The fact that decides the answer to the question is, not, Do all the clergy of Roman Catholicism and of Protestantism agree that Jehovah’s witnesses have been and are God’s prophet to the nations? but, Who discerned the divine will for Christians in this time of the world’s end and offered themselves to do it? Who have undertaken God’s foreordained work for this day of judgment of the nations? Who have answered the call to the work and have done it down till this year 1958? Whom has God actually used as his prophet?14 By the historical facts of the case Christendom is beaten back in defeat. Jehovah’s witnesses are deeply grateful today that the plain facts show that God has been pleased to use them. All the preaching and all the Bible educational work that they have done till now in 175 countries and islands of the sea they confess has been, not by help of a military army, nor by human power, but by God’s spirit, his invisible active force. (Zech. 4:6, AV) It has been because Jehovah thrust out his hand of power and touched their lips and put his words in their mouths.It has evidently been because he commissioned them to be over the nations and over the kingdoms. Happy are all those who have seen what the work of Jehovah God for now is and who have volunteered to do it. (w59 1/15 pp. 40-41 pars. 13-14)