2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36427Examples of space-times are given which contain scalar curvature singularities whereat the metric tensor is regular and continuous, but which are gravitationally strong. Thus the argument that such singularities are necessarily weak is incomplete; in particular the question of the gravitational strength of the null Cauchy horizon singularity which occurs in gravitational collapse remains open.General Relativity and Quantum Cosmologytext