> How can it be that having intimate knowledge of someone would not allow you to sell them more stuff? If the unknowns have a greater influence. So, a little k

> How can it be that having intimate knowledge of someone would not allow you to sell them more stuff? If the unknowns have a greater influence. So, a little knowledge makes google overconfident. Half the money I spend on advertising is wasted; the trouble is I don't know which half.