Thanks for that comment. Retribution is not compatible with a system that falsely convicts the innocent. People may point to "rock-solid" cases such as those with a confession, but even confessions have been proven to be coerced from the innocent.

Before anyone concludes from this that I think most prisoners are falsely imprisoned--I do not. But the rate is higher than most think, and because of that aspects of punishment that are motivated by revenge carry a price of violence against innocents.