This is a sketch of a non-mathematical approach to instrumental convergence, presupposing that it is possible to map what is otherwise unobservable. The 1951 Hitchcock film, "Strangers on a Train," shows out the 2π realm of the tennis pro Guy Haines can be set into non-orientation by the objet-a, the monogrammed cigarette lighter stolen by the blackmailer Bruno, to force Guy into a symmetrical exchange to remove the element of motive (cf. intentionality) from the murder equation. The viewer is expected to do some homework on this!