If knowledge exists… where does it come from? You look. You hear. You touch. You know. Or do you?
AQA Philosophy: Problems with Justified True Belief (and What Comes After)
What happens after Gettier cases and how philosophers have tried (and often failed) to fix the problem...
AQA Philosophy A Level: What Is Knowledge, Actually?
Epistemology is the branch of philosophy concerned with knowledge: what it is, how we get it, and whether we have it at all.