Final answer:
Knowledge skepticism questions the possibility of knowledge in general, while justificational skepticism focuses on the concept of justification for beliefs.
Step-by-step explanation:
Knowledge skepticism and justificational skepticism are two different perspectives within epistemology. Knowledge skepticism is the belief that some or all knowledge is impossible. It questions the possibility of knowledge in general, including justification for beliefs about the external world. On the other hand, justificational skepticism focuses specifically on the question of justification.
It challenges the notion of what counts as justified belief, and whether we can ever be justified in accepting our beliefs as true.