Retrocausality is like time being cooked spaghetti instead of dry. Or even macaroni. The world line is not "parallel" to the time line. Like the One Electon Uni

Retrocausality is like time being cooked spaghetti instead of dry. Or even macaroni. The world line is not "parallel" to the time line. Like the One Electon Universe idea ofositrons as time-reversed electrons. The article doesn't define time travel precisely, but presumably they mean discretely jumping ahead or back without passing through interventing moments.