Ownership, borrowing and lifetimes are discussed after vectors and before methods, but the text seems written with another order in mind. In particular, there's an inaccuracy in https://doc.rust-lang.org/book/ownership.html, which says: > We'll cover vectors in detail later in this chapter [...] Should this be removed/rephrased/dealt with some other way? I might try a PR for this (removing the inaccuracy) myself.