Response:  Find one of these spurious correlations and tell me what you think of it.  If possible, find some tortured logic to explain why the relationship is not simply a coincidence.

http://www.tylervigen.com/spurious-correlations

Memo:  Think of a real world issue where people fail to understand a cause and effect connection.  Identify the issue, give an example of its use, and explain the flaw in the analysis.