Know that speech is of two types: speech in materials called letters, and it is in two types: either numbered, meaning letters, and called a book, or verbalized and called speech and speech. The second type is speech that is not in materials, so that speech that is not in materials is known and is not said in it, it is understood, so knowledge is attached to it from The listener who does not hear with an instrument, but rather hears with a truth devoid of the instrument, just as if the speech is in non-subject matter, he only hears what suits him and what is in the matter to which understanding is attached, and this is a special attachment in knowledge. If the hearer knows the word from the one who pronounces it, or sees the writing, then he knows what the speaker intends in that matter. The word, even though it includes in the terminology many meanings other than what the speaker intends by it, is that understanding, even if he does not know what the speaker means by that word in