| http://www.w3.org/ns/prov#value | - We do not know initially it is got valuable information and who doesn't, and the early responses from a clever well-informed torture victim will look exactly like the responses from an ignorant torture victim. (If I have information, my best strategy is to convince you that I don't, rather than convincing you that I have information that I never share.) As far as I can see, the only way around this
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