On The Value Of Omniscience...

Consider this: for every person who has purchased wine from you, you *know* what they bought:

Dear Ralph:

Remember that '97 Acme Winery Reserve Cabernet Sauvignon you bought three years ago? Now might be a good time to drink it.  Just sayin'.

Sincerely,
 The Acme Winery Team

PS - the 2009 vintage is now available, and because you bought the '97, we have a little surprise for you...

This is the tremedous power of data.  And you're the only one who has it.

Just sayin'.