兵不厌诈bīng bù yàn zhà用兵打仗可以使用欺诈的办法迷惑敌人{deception is justified in war; in war nothing is too deceitful; there can never be too much deception in war; all is fair in war;}(不厌{bu yan}: 不排斥;不以为非。{it is justifiable to; it is not incorrect to}语本《韩非子·难一》: ‘战阵之间,不厌诈伪’{Hanfeizi·Rebuttals(I): ‘There can never be too much deception in war.’})。