text: One member of this school of thought developed a three stage criterion for it, which he illustrated by using the example of a rope in a dark room.
full_question: One member of this school of thought developed a three stage criterion for it, which he illustrated by using the example of a rope in a dark room. Legendarily, the founder of one branch of this non-Confucian school left his friend to die while he was trapped in a hole. Circularity and regress are among this school’s “five modes” named for Agrippa, and it included Carneades. Pyrrhonism, a movement within this school of thought, included an author who wrote Against the Mathematicians, Sextus Empiricus. For 10 points name this school that questions the certainty of much of knowledge.
first_sentence: One member of this school of thought developed a three stage criterion for it, which he illustrated by using the example of a rope in a dark room.