causation

And then there are these questions about causation and correlation.

"People will travel long distances to stand in the spot of their favourite film characters and the causation impacts of that can be considerable," Mr Levinthal said.

The judge wrote: "In principle he has most to gain from the destruction of material which helps the claimant’s case on causation."

That means correlation does not always equal causation and they further state that they can't "provide a quantitative estimate of the number of IQ points lost for a given increase in fluoride exposure measures."

“Had Caltrans followed through, it might have had a chance to break another link in the chain of causation that resulted in the fire the following year,” the report found.