This makes the question of addiction and choice profoundly vexed. To me, a good analogy for the way will is hampered—but not eliminated entirely—is as follows: Consider a prisoner who is locked in a cell that contains a completely hidden trapdoor to an escape route. On the surface, there is no way out: the bars are strong and placed tightly together, the walls are stone, and the door is securely locked. The window is out of reach, and too small and barred, besides. If the prisoner does not know that the possibility of escape exists via the trapdoor, she is not “free” to choose it—even though
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