could make the marginal meshing look the reason is that because each value has a distinct frequency here so if you match it in the wrong way the marginal distribution of the induced mapping would no longer be measuring the original one but there are still a lot of ambiguity right so if we imagine a distributions that's like the most kind of the most difficult one let's say I have a uniform distributions over two random variables then this is kind of hopeless because all kind of mapping could work so let's first look at the a