[jacamera]

We can't. At least not always. And they don't even have to be compromised, they could also just be (and often are) wrong. Also, even when they're right it's going to be about about some small part of an impossibly complex whole. I think "what the experts/data say" should play an important, but extremely small role in how we decide to live our lives, with the balance made up by input from our close friends and family and those who are physically/geographically close to us.