Imagine you had a scale, onto which you put a weight labeled &quot;100kg&quot;. You know it weights 100kg because it says so right there. The scale however, only registers 85kg. You take it off, you put it back on, the scale always says the same thing. You try different scales, they say 85kg, but you <i>keep going</i> because it&#x27;s 100kg and you&#x27;re going to find a scale that&#x27;s accurate! Eventually you find a scale that says what you want.<p>This straw man illustrates that at some point, it isn&#x27;t the tool, but the process that&#x27;s flawed. Even if your tool is accurate, if you don&#x27;t believe it, you can&#x27;t get at the truth, and if you work hard enough you can find a broken tool to tell you what you want.<p>So perhaps there is some truth to the idea that torture can extract true information from people, but if the whole process operates like the above straw man, it totally invalidates the use of the tool.