Certain knowledge allows us to act on the world with confidence. For this reason, we are particularly exposed to risk when we encounter knowledge that seems certain but in fact isn’t. To solve this problem, we have created the category of ‘experts’: an individual who, in virtue of training and accreditation, can be trusted to give us access to truth. But experts have fallen on hard times; allegedly, people no longer trust experts, and prefer to get their facts elsewhere. This part of the course will use philosophy to explore the nature of expertise––how it functions, why we trust it, and when we stop trusting it. Necessarily, this will also touch on questions of authority and epistemic justice: do some people get believed merely because they are powerful? The course will foster the skills necessary to evaluate expertise, and where best to deploy it.