Yes, I understand that; my point is that if &quot;one in ten people are using a device with this exact screen resolution&quot; and &quot;one in a thousand people have this user agent&quot; then it is not true that &quot;one in ten thousand people have a device like this one&quot; if &quot;half the people with this user agent have this exact screen resolution&quot;: it is only then true that &quot;one in five thousand people have a device like this one&quot;. If everyone with that user agent has that screen resolution, the result would just be &quot;one in a thousand people have a device like this one&quot;.<p>I am concerned that they are calculating entropy incorrectly as I feel very confident that there are pretty obvious correlations between many of these variables: given my user agent you can guess my screen resolution with a probability much better than random chance (as you know I have an iPhone, and there are only so many screen resolutions for an iPhone, and some of these iPhone configurations are more common than others in the wild) and it might be the case that you can guess my &quot;plugin configuration&quot; with 100% accuracy.