2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/175373The familiar Bang/Crunch singularities of classical cosmology have recently been augmented by new varieties: rips, sudden singularities, and so on. These tend to be associated with final states. Here we consider an alternative possibility for the initial state: a singularity which has the novel property of being inaccessible to physically well-defined probes. These singularities arise naturally in cosmologies with toral spatial sections.10 pages, version to appear in Classical and Quantum GravityGeneral Relativity and Quantum CosmologyAstrophysicstext