Editing Principle of locality (section)

=== Action at a distance ===
[[File:Models of locality Continuous action.png|thumb|Action at a distance]]
The simplest locality model is no locality: instantaneous action at a distance with no limits for relativity. The locality model for action at a distance is called ''continuous action''.<ref name="WhartonArgaman" /> The gray area (a circle here) is a mathematical concept called a "screen".  Any path from a location through the screen becomes part of the physical model at that location. The gray ring indicates events from all parts of space and time can affect the probability measured by Alice or Bob. So in the case of continuous action, events at all times and places affect Alice's and Bob's model.  This simple model is highly successful for solar planetary dynamics with Newtonian gravity and in electrostatics, cases where relativistic effects are insignificant.