learning principles one is marginal matching and then the other is psycho consistency and I guess it's a good question that whether those are the all of the invariances that we can rely on or are there additional learning signals that we can derive from it it's a good open problem and if we step back and think about this whole problem it's really aligned to distributions we found knowing what's inside was really difficult if we if we think about the categorical distribution that has even probabilities like it's just impossible