we have decades of research in behavioral science that tells us that predicting what individuals are going to purchase is logistically impossible. We can predict what large groups of populations are going to buy and that’s what makes it possible to stock grocery stores with the right assortments based on where they’re located. But knowing exactly what Sarah Marzano is going to purchase on her next grocery order is nearly impossible.

We market to abstract groups.
We sell to individual humans.

via Sarah Marzano on Behind the Numbers podcast