News reporters and weathermen frequently stand in front of a blue screen. The blue is chromakeyed out and replaced with another image. That other image might just be the backdrop of the city, a file photo taken years before. Not saying that is what happened but it needs to be considered.

Causality refers to the relationship between two events. One happening after another leads to consideration of the relationship between the two events.


http://en.wikipedia.org/wiki/Causality

Causality (also referred to as causation[1]) is the relationship between an event (the cause) and a second event (the effect), where the second event is understood as a consequence of the first.[2]

In common usage, causality is also the relationship between a set of factors (causes) and a phenomenon (the effect). Anything that affects an effect is a factor of that effect. A direct factor is a factor that affects an effect directly, that is, without any intervening factors. (Intervening factors are sometimes called "intermediate factors".) The connection between a cause(s) and an effect in this way can also be referred to as a causal nexus.

Though the causes and effects are typically related to changes or events, candidates include objects, processes, properties, variables, facts, and states of affairs; characterizing the causal relationship can be the subject of much debate.

The philosophical treatment on the subject of causality extends over millennia. In the Western philosophical tradition, discussion stretches back at least to Aristotle, and the topic remains a staple in contemporary philosophy.