McGichrist write about the Master and the Emissary to explain the conscious and subconscious human brain. The octopus takes this to a whole new level with eight separate sub-brains, each a Markov blanket to itself as demonstrated when one gets severed. Unlike the tail of a drop-tail skink, the severed arm shows continuing evaluation and adjustment to its environment.

Is there a "what it is to be an octopuses arm", does it exhibit agency like a human? Most likely not but it blurs the boundary between organic and non-organic consciousness.

That makes no sense.