In the below image, you can see the results of applying an un-linked categorical generator across both City and State columns. In the un-linked case, each column has their respective value shuffled, independently of the values in the other column. Notice that most combinations of City and State are not valid, e.g. Austin, Georgia in row #2 and Seattle, Florida a few rows later. However some rows remain valid, but this is due entirely to randomness, e.g. row #1 is Dallas, Texas.