 The heart of the worry is that singular structure seems to signify so profound a breakdown in the fundamental structure of spacetime that it could wreak havoc on any region of the universe that it were visible to. Because the structures that break down in singular spacetimes are in general required for the formulation of our known physical laws, and of initial-value problems for individual physical systems in particular, one such fear is that determinism would collapse entirely wherever the singular breakdown were causally visible. In Earman's (1995, pp. 65–6) evocative conceit, nothing would seem to stop the singularity from disgorging any manner of unpleasant jetsam, from TVs showing Nixon's Checkers Speech to old lost socks, in a way completely undetermined by the state of spacetime in any region whatsoever. As a result, there could be no reasonable expectation of determinism, nor even just predictability, for any region in causal contact with what it spews out. 