The fault lies with <i>both</i> of them. It is VW&#x27;s responsibility to be moral and comply with laws. It is the EPA&#x27;s responsibility to catch those who attempt to cheat. They both failed, in easily preventable ways. They are both at fault.<p>VW&#x27;s management should be jailed, and the EPA should probably be reprimanded or have someone fired for letting this go uncaught for so long.