 These views about time are closely connected to views about space and about motion. Most obviously, these views about time have straightforward spatial analogues—one may be a substantivalist about space (and thus endorse the existence of absolute space in addition to spatial relations between things), or one may be a relationist about space (and thus deny the existence of absolute space). Substantivalism and relationism about time have traditionally been taken to stand or fall with their spatial counterparts. In addition, the choice between substantivalism and relationism about space and time has consequences for your theory of motion. If you are a relationist about space and time then you must also be a relationist about motion: all motion is motion relative to something. If you are a substantivalist about space and time, you will endorse, in addition to relative motion, the notion of absolute motion, where absolute motion is motion relative to absolute space and time. If you are a substantivalist, in addition to facts about whether and how fast a train car is moving relative to the track, whether and how fast it is moving relative to the cars, and so on, there will also be a fact about whether and how fast the train car is really moving—whether and how fast it is moving relative to absolute space and time.