A good prediction is one which is made BEFORE the outcome. All of these armchair data scientists had the opportunity to short Zillow BEFORE it was obvious that

A good prediction is one which is made BEFORE the outcome. All of these armchair data scientists had the opportunity to short Zillow BEFORE it was obvious that zoffer was losing money. No one did? The best outcome which could flow from this is a sort of adverse peer review in data science based on asset trades. To be honest, the zillow data team should have sought this themselves, the community could have debugged them.