Page "Cosmic censorship hypothesis" Paragraph 19

* It is not difficult to construct spacetimes which have naked singularities, but which are not " physically reasonable ;" the canonical example of such a spacetime is perhaps the " superextremal " < math > M <| Q |</ math > Reissner-Nordstrom solution, which contains a singularity at that is not surrounded by a horizon.

A formal statement needs some set of hypotheses which exclude these situations.