It's not what you think you know, but how you can justify your knowledge that is most important.
How do you know what the weather will be like tomorrow? How do you know how old the Universe is? How do you know if you are thinking rationally?
These and other questions of the “how do you know?” variety are the business of epistemology, the area of philosophy concerned with understanding the nature of knowledge and belief.
Epistemology is about understanding how we come to know that something is the case, whether it be a matter of fact such as “the Earth is warming” or a matter of value such as “people should not just be treated as means to particular ends”.
It’s even about interrogating the odd presidential tweet to determine its credibility.
Epistemology doesn’t just ask questions about what we should do to find things out; that is the task of all disciplines to some extent. For example, science, history and anthropology all have their own methods for finding things out.
Epistemology has the job of making those methods themselves the objects of study. It aims to understand how methods of inquiry can be seen as rational endeavours.
Epistemology, therefore, is concerned with the justification of knowledge claims. [keep reading]

















