If you observe a black box producing a sequence N items, you can’t know whether it will, after that, repeat the same sequence at infinitum (it might just contai

If you observe a black box producing a sequence N items, you can’t know whether it will, after that, repeat the same sequence at infinitum (it might just contain a circular tape of N items, for example), or keep producing a single identical item, or keep producing only two different items, etc.