 If the auxiliary assumptions are accepted, then the lesson to be drawn from the experimental violation of Bell inequalities is that the condition that Bell called the Principle of Local Causality must be rejected. As we have seen, this condition is a conjunction of two conditions: a causal locality condition (PLC-1, above), and the Principle of the Common Cause. The causal locality condition itself can be regarded as stemming from the assumption that causes temporally precede their effects and Lorentz invariance of the relation of temporal precedence. If the relation of temporal precedence is to be Lorentz invariant, then either it is the trivial relation that holds between any two spacetime points, or else the past of a spacetime point is its past light cone (Stein 1991, 2009).