ABSTRACT
Epistemology is the study of knowledge and related concepts, including belief, justification and certainty. It looks at the nature, possibility and sources of knowledge. This chapter focuses on three theories of perception: direct realism, indirect realism, and idealism. It discusses different types of knowledge: acquaintance, ability, and propositional knowledge. The tripartite definition aims to provide a complete analysis of the concept and nature of propositional knowledge. Both the tripartite view and reliabilism share a common approach to the analysis of knowledge. The chapter discusses scepticism which can target knowledge from any source, including the two sources: perception and reason. And so it challenges both empiricism and rationalism. The debate between innatism and classical empiricism is about whether there is any innate propositional knowledge. Everyone can agree that there is innate ability knowledge. The chapter confesses that babies have certain psychological abilities, such as memory and the disposition to learn a language.
