For any one instance? You can't. But in aggregate, we do it all the time: https://en.wikipedia.org/wiki/Kullback%E2%80%93Leibler_divergence https://en.wikipedi

For any one instance? You can't. But in aggregate, we do it all the time: https://en.wikipedia.org/wiki/Kullback%E2%80%93Leibler_divergence https://en.wikipedia.org/wiki/Kullback%E2%80%93Leibler_diver...