Omni-jennic principle
From Jenny Everywhere Wiki
The omni-jennic principle was the ad hoc theory describing the fact that “there is a Jenny in every world”. It had two forms, and different incarnations of Jenny Everywhere differed on which they believed. The “weak” omni-jennic principle simply said that a Jenny objectively existed in every known universe, while the “strong” omni-jennic principle stated that this was an ontological necessity, and thus that “the mere existence of a universe [brought] forth a [Jenny] to live there”. (PROSE: So You're Jenny Everywhere)