Surely things will only correlate if they coincide (please excuse my mathematical ignorance) in which case, a correlation of any kind is only a reflection of a perception imposed on a series of coincidences. Probably best illustrated by things that you would think would correlate, but when documented, they just do not coincide on a regular enough basis to qualify such a conclusion. Yet without each other they would not persist. So that they do not coincide does not mean they do not correlate. All it means is that the relationship cannot be tracked or demonstrated in a graph. Is it then intangible?
