Problems with this scheme arise however, if the universe were expanding and unbounded, as then different averaging procedures could give different different results for the centre-ofmass velocity at any given place. Once that has happened, the initial symmetric situation is broken, as the Pokies - Pharaoh's Fortune situation has no rotational symmetry. (We would require here that there did exist such hypersurfaces which typeset globally, and were free from singularities.) There is no reason to expect that any actual ordering of events should follow the time coordinates of any observer who uses rectilinear coordinates. direction. The trouble is, that we know of no reasons to select any one such set of hypersurfaces, rather than another, as the basis for the actual ordering of all Pokies - French Cuisine Furthermore, if we did know of a basis to select one such set, this would seem to be counter to the theory of relativity, which requires that all laws of nature must be invariant with respect to changes of velocity and position. All events have a definite order, and according to this actual order, earlier events can affect the propensities for later events with which they are correlated. Similar kinds of Principles Pokies - Pharaoh's Fortune been typeset to explain the direction of time, if the laws of physics themselves do not specify any direction (see eg Cramer ). After spontaneous symmetry breaking, symmetric laws are broken by the requirement that something actually happens. We do not however specify those actual orders in advance, and cannot, because they depend, we now postulate, on details which only come to be true once those events have definitely happened. Then, as we shall see in the present case, what has actually happened in the past propagates its effects to infiuence present symmetry breaking. Yet, the initial state is unstable, and the ball will eventually fall in one direction or another typeset . Under the contingent actualising hypothesis being proposed, one detection event will become definite before the other for reasons to do perhaps with potentiality distributions. Other examples of spontaneous symmetry breaking are well known in physics, such as the Weinberg-Salaam theory typeset the electromagnetic and weak interactions. Although the actual ordering is not determined by any law, once the typeset have occurred the ordering is definite, just as the precise time of the decay of a radioactive atom is not determined by quantum laws, but (if actually observed) is completely definite once it has occurred. The third option is the most general case of using time orders, taking note of the fact of the arbitrary nature of any t = const hypersurfaces that could be used to order actual events as in :FIGREF refid=suchyp. In the Aspect version of the EPR experiment, for example, the detection events can be placed in a spacelike relation, so that their places alternate with each other.