Individual cases don't tell you much. Patterns of behaviour much more-so. If Senator A and Senator B are meeting regularly, that tells you something. Ask any c

Individual cases don't tell you much. Patterns of behaviour much more-so. If Senator A and Senator B are meeting regularly, that tells you something. Ask any cab driver about drugs and prostitution in their locale and they'll be able to give you quite a lot of information (you might have to buy them a beer or three first). Uber's records could reveal substantially similar things, like "Person X from escort agency Y visited address Z twice a month for a year". If you know who lives at Z, you know a lot. Again: not from one trip, but from the pattern. And not with certainty (obviously: knowledge is not certain) but with high enough plausibility to target a deeper investigation.