This is the second post in a planned sequence of three. I promise that tomorrow's will be the last.
Those of us who seek to learn from data would do well to abide by the Box/Berra Caution:
George Box: All models are wrong; some are useful.
Yogi Berra: In theory, there's no difference between theory and practice; in practice, there is.
In short, jumping to conclusions is easy; learning from data is hard.
George W. Cobb