A friend has a theory that if an ad say "X is Y", it's because a bunch of surveys and marketing studies have shown that people think that X is ~Y. So if people

A friend has a theory that if an ad say "X is Y", it's because a bunch of surveys and marketing studies have shown that people think that X is ~Y. So if people think some soft drink is unhealthy, the ad companies will make ads showing it is healthy. He takes it a step further and says that all ads are lies. I wouldn't go that far myself, but I think that it's not just Facebook and it's not just election lies that are being spread.