Accidents, in the deterministic sense, are not designed, but simply "happen." They are out of control in that their what, where, or when can never be predicted exactly. But they are designed, in the Virilian sense, because the creation of any working system insures their probability, thus their inevitability. In that sense, we had better learn how to live with them, if they are not always to be catastrophic, or to work creatively with them, if anything constructive is to emerge in their aftermath. The first step is to acknowledge that accidents arise spontaneously not from an infinite number of possibilities, but from a limited set of probabilities: a matrix, a trajectory field of unpredictably transforming vectors.

Lebbeus Woods, The Storm and The Fall (Princetion Architectural Press, 2004) pp. 117-119