Simplified & short;
If P, then Q. Q. Therefore, P.

The question remains, postdictions or predictions? I observe a certain group of people in a culture doing something, then I postdict it with EvPsy or alien control. I observe many people dying around age 80. My theory is that if alines exist, they kill people around age 80. A postdiction with observation, is utterly worthless. It is "just so" storytelling. Observation is not enough in our case, take a walk to the the faculty of sociology. And yet, establishing casual links & correlations isn't important?

EvPsy have no apparent correlation to these behaviors, or cultures who motivate/shape them. Can you think of any falsifiable test for this explanation? Is this science?