 Of most interest, however, is the way that sudden singularities may differ in an even more fundamental way from standard singularities: there need be no path-incompleteness associated with them (Fernández-Jambrina and Lazkoz 2004, 2007). In effect, although the values of some physically important quantities diverge, the metric itself remains well defined, allowing curves “running into” the pathological point to continue through it. Indeed, point particles passing through the sudden singularity would not even notice the pathology, as only tidal forces may diverge (and not even all sudden singularities involve divergence of those): point particles, having no extension, cannot experience tidal force. If one wants to count sudden singularities as true singularities—and there seems every reason to do so—then this would put the nail in the coffin for the idea that singularities always can or should be associated with “missing  points”.[7] 