we're saying here is just that like when in the case of both of when we say we know the P and the Q are both deterministic then it reduces to the deterministic mapping example but it could exist in a more general form so probably the best-known example that uses those learning signals are cycle again so psycho gains laws essentially consists of two parts one part is this marginal matching so meaning after I translate my data from one domain to another the marginal of them still match with each other and you can kind of see