continuant fiat boundary zero-dimensional continuant fiat boundary zero dimension continuant fiat boundaries are not spatial points. Considering the example 'the quadripoint where the boundaries of Colorado, Utah, New Mexico, and Arizona meet' : There are many frames in which that point is zooming through many points in space. Whereas, no matter what the frame, the quadripoint is always in the same relation to the boundaries of Colorado, Utah, New Mexico, and Arizona. the quadripoint where the boundaries of Colorado, Utah, New Mexico, and Arizona meet A zero-dimensional continuant fiat boundary is a fiat point whose location is defined in relation to some material entity. [BFO] 0D continuant fiat boundary (iff (ZeroDimensionalContinuantFiatBoundary a) (and (ContinuantFiatBoundary a) (exists (b) (and (ZeroDimensionalSpatialRegion b) (forall (t) (locatedInAt a b t)))))) // axiom label in BFO2 CLIF: [031-001] 0d-cf-boundary zero-dimensional continuant fiat boundary ZeroDimensionalContinuantFiatBoundary a zero-dimensional continuant fiat boundary is a fiat point whose location is defined in relation to some material entity. (axiom label in BFO2 Reference: [031-001]) the geographic North Pole the point of origin of some spatial coordinate system.