When Joseph Harris describes working with texts by “taking words, images, or ideas from it and putting them to use in new contexts,” what does he call it?

In the representative example Harris uses to model the “borrowing” move, who is Postman “borrowing” from?

When it comes to academic writing, Harris maintains that “the goal of such writing is not to have the final word on a subject, to bring the discussion to a close, but to push it forward, to say something new, something that seems to call for further talk and writing.”

In his chapter, Harris offers the following example to describe which move? Do you think, as I once did, that advertisers make decisions based on solid research? Well, think again. “Broadly speaking,” says Joseph Smith of Octoby-Smith, Inc., a consumer research firm, “there is no persuasive evidence that the editorial context of an ad matters."

What metaphor is often used to describe academic writing?