What is epistemiology?

Answer 1

Epistemology is a branch of philosophy which is concerned with the nature, origin, validity and limits of human knowledge.

Answer 2

Epistemology is the branch of philosophy that deals with the nature and scope of knowledge, including how we acquire knowledge, what knowledge is, and how we can justify or rationalize our beliefs. It explores questions such as: What can we know? How do we know what we know? What are the limits of knowledge?