Supppose I have a sequence as so (which we can really think of as a sequence of smaller sequences):
[[1 1 1 1 1 1], [2 2 2 2 2 2], [3 3 3 3 3 3], [4 4 4 4 4 4]]
Is it exchangeable? Is it not? Why? It is a fairly loose question I know, but I am trying to understand how to answer this question.