It could be argued that this represents 80% of your life already. How often do you discuss new things you bought with friends? Quite often probably, except for

It could be argued that this represents 80% of your life already. How often do you discuss new things you bought with friends? Quite often probably, except for some things which are very private. But even some of them can be inferred from your searches (e.g. for medications). The question is, how much (technological) effort is Google willing to throw at this problem to find out this much about you. (In the same vein, I am often wondering whether Google has some special APIs for governments which allow for some deep data mining of their data for special fees. But perhaps that's just me being overly paranoid.)