Word-Document

Merriam-Webster online defines the word, "dcoument" thus
1 aarchaic : proof , evidence b: an original or official paper relied on as the basis, proof, or support of something c: something (as a photograph or a recording) that serves as evidence or proof
2 a: a writing conveying information b: a material substance (as a coin or stone) having on it a representation of thoughts by means of some conventional mark or symbol
It is this this 2b definition of document that Focault refers to in The Archaeology of Knowledge. He does not ascribe truth to recovered documents from times past, or at least does not ascribe verity to what is conveyed or what is being attempted to be conveyed. The meaning and truth of any given document lies in its context, without which a foreign reader, i.e., anyone who is not the document's author, or witness to its inscription, will ever be able to derive truth from a given document.