AlloComrades of Yore ,
With Sales Teams of the BizIntelligence Companies doing a good job and getting good support from the Ivy Tower(pdf:Competing on Analytics) there has been a groundswell in using data to prove anything one wants to.
But the Data Analysts have lot to learn from Economists especially the Micro-Variety who have made empirical Analysis a science or atleast as close as it can possibly be.
Inspired by Godel's Theorem on limits of Mathematical Proofs, I have always been intrigued by limits of any scientific endeavor. What the science/methodology can't tell us.
Few of the major caveats one need to keep in one's mind as we crunch the numbers are listed below