积非成是（積非成是）　

◎ 积非成是 jīfēi-chéngshì

[many mistakes makes “right”;Accumulation of errors makes correctness] 错误的东西积年累月维持下去,反而逐渐被当成正确的东西看待

众口铄金,积非成是。——鲁迅《三闲集》