As for their knowledge of letters and names, know that letters have properties and are of three types, including numerical, verbal, and conjured letters. And by conjured letters, I mean the letters that a person conjures in his illusion and imagination and pictures. Either he conjures numerical letters or verbal letters, and so on, letters have another rank, so he does by conjuring just as he does with a book. Or pronunciation. As for the letters of pronunciation, they are only names. These are the properties of names. As for the numbered ones, they may not be names. The people of this knowledge differed as to whether a single letter does it or not. So I saw among them a group of people who prevented that from being done. There is no doubt that when I went into something like this with them, I stopped them on their mistake in that. What they went to, and their error, and what they lacked in the expression of that, and among them were those who confirmed the action to the single le