What would you suggest to solve the problem solitary is aiming to solve? Chesterton's Fence was built for a reason. Solitary isn't torturous in the traditional sense of the word. It is consistent with the idea of prison--it's just a worse version of prison. It acts to disincentivize rule breaking within the system. What other ways can we attack this problem with high enough confidence that removing the proverbial "fence" will not result in a total disaster.