I can't resist mentioning this. We do some of our teaching with "case studies." That has a specific meaning -- we give them background information, let the students work in groups, and then come back to the whole to discuss their rationale for the answer to the question. Anyway, guess what? I wrote a case asking the same question that the Commish asked at the start of this thread! \:\)

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From Bob Lusk: Dr. Dave Willis passed away January 13, 2014. He continues to be a key part of our Pond Boss family...and always will be.