&quot;We have to assume the conviction is correct.&quot;<p>That takes quite a faith in process that has little remedial feedback.<p>Unlike say engineering or medicine where there can be a said to be an objectively observable system where all strive towards similar outcomes - and even those disciplines screw up constantly.<p>&quot;Otherwise that leads to basically letting everyone go free just in case they&#x27;re actually innocent&quot;<p>There is a huge category of crime where long term incarceration absolutely does no help to anyone whatsoever.