When and Why Should We Believe Experts?

Professor Quasimodo says that we should brush our teeth twice a day and Professor Mosiquado says that brushing teeth has no dental benefits and is a complete waste of time. They’re both dental experts! How do we figure out what to believe in a case like this? Well, here’s one promising model: We should trust what an expert says about X if and only if the expert is relaying the consensus...