Forward light-cones and special relativity

[SarahO]

Homework Statement

How can we tell that quantum effects do not propagate along forward light-cones that represent two separate events? How do light-cones demonstrate this notion of quantum effects?

Homework Equations

The Attempt at a Solution

We don't know which events occur first given different spacetime equations

 

[strangerep]

How can we tell that quantum effects do not propagate along forward light-cones that represent two separate events? How do light-cones demonstrate this notion of quantum effects?

I'm having trouble make sense of this question. Where did it come from?

A light cone consists of an infinity of points in spacetime, so what do you mean by "light cones that represent two separate events"? Do you mean 2 light cones having their respective apexes at separate events?