Philosophical skepticism

Philosophical skepticism is a school of thought within philosophy that questions the possibility of certainty in knowledge. It challenges the notions of knowledge, belief, and justification, raising doubts about our ability to know anything with absolute certainty. Skepticism can take different forms, ranging from radical skepticism—which asserts that knowledge is impossible—to more moderate forms that raise doubts about specific areas of knowledge, such as moral knowledge, the external world, or the existence of other minds.