Final answer:
Skepticism is a philosophical belief that questions the possibility of knowledge. It argues that some or all human knowledge is impossible to attain. Skepticism can be explored in various domains, such as philosophy, religion, morality, and the external world.
Step-by-step explanation:
Skepticism is a philosophical belief that questions the possibility of knowledge. It argues that some or all human knowledge is impossible to attain. Skeptics suggest that it is better to suspend belief rather than rely on uncertain reasoning. The level of justification required for knowledge is a central debate among skeptics. Skepticism can be explored in various domains, such as philosophy, religion, morality, and the external world.