# Weak cosmic censorship The word censorship here refers to the fact that nakedness should not be seen. In General Relativity, it is conjectured that generic initial data should not evolve to a naked singularity, i.e., one that is not protected by a horizon. More mathematically, the weak cosmic censorship requires that the evolution of generic initial data has a complete future null infinity, aka $\mathscr{I}^+$. In asymptotically flat four-dimensional spacetimes, there is still no convincing evidence that WCC is violated, but it has been known to be violated in other dimensions and/or with a cosmological constant. Recently, there is numerical evidence that WCC is true in four dimensions. ## Refs - original: [[1969#Penrose]] - more precise than original - [[book_GerochHorowitz]] - [[Wald199710]] a review ## Definition - complete $\mathcal{I}^+$ in flat, or conformal boundary in AdS ## Curious discussions - [[Hod2021Essay]] - Hawking radiation may violate cosmic censorship ## Counter examples - 4D flat - [[EperonGanchevSantos2019]] - semi-conclusive semi-classical counterexample ## Related topics - [[0208 Strong cosmic censorship]] - [[0177 Weak gravity conjecture]]