I'm still having difficulty trying to make sense of this data: It may look familiar to some of you; it came from here. This set of data in particular is important because it says that whenever the electrons both have +1/2 spin or both have -1/2 spin, the lights will both be Red or Green. How can we prove this by creating a computer program? Also, can someone give me an heuristic explanation how this phenomena actually takes place? In other words, why do the lights light 1/2 the time rather than 5/9'th the time?