Epistemology is concerned with the nature of knowledge and justified belief. What is knowledge? Can we have any knowledge at all? Can we have knowledge about the laws of nature, the laws or morality, or the existence of other minds? The view that we can’t have knowledge is called skepticism. An extreme form of skepticism denies that we can have any knowledge whatsoever. But we might grant that we can have knowledge about some things and remain skeptics concerning other issues. Many people, for instance, are not skeptics about scientific knowledge, but are skeptics when it comes to knowledge of morality. Later in this course we will entertain some skeptical worries about science and we will consider whether ethics is really in a more precarious position.