A while back, I wrote an article here titled “Implied Causality in Line Charts.” The article examined the notion that certain charts imply a causal relationship between an event and an outcome, when such a relationship may not actually exist. In that post, I used line charts as a running example. I identified three ways in which line charts can suggest this type of relationship: the change in a trend after an event, the comparison of different temporal evolutions of two or groups of entities tha...