Pyrrhus (365 BC or 360 BC-275 BC or 270 BC), a skeptical philosopher in ancient Greece, was the founder of Pyrrhism. The main representative of ancient Greek skepticism. Alice. I participated in the expedition of Alexander's army and went to India. He believes that knowledge gained by feeling and reason is unreliable, and it is impossible to know the objective world, or even doubt its existence. People can't tell the truth from their feelings or opinions. They should unswervingly insist on not expressing any opinions, not making any judgments, saying that nothing exists, nothing exists. He believes that human behavior is only an agreement made according to customs, without glory, injustice, beauty and ugliness; Therefore, nothing can be sure, because people can say the opposite proposition to any proposition. In his view, the highest goodness is not to make any judgment and have no knowledge. He advocates being indifferent to everything and not making any response, so as not to cause unnecessary arguments and troubles. Only in this way can we get inner peace. According to Diogenēs Laertius, once Pyrrho was caught in a storm on board, and everyone on board was very scared. But he pointed to a pig still eating quietly on the boat and said that a wise man should be as indifferent as this pig. Later generations called Pyrrho Happy Pig.