assumption yeah I mean that's a good question you could definitely try deep sea CA for CCA like I mean we have to have some kind of I guess place where we want to say something is like you know like where we kind of conclude that things are not that's similar to each other representational e and we thought linear is like kind of a good proxy because you know layers kind of operate linearly and so like you know things are sorted within linear transforms of each other it seems like a reasonable kind of call to say okay that's sort of somewhat