The Science of Consciousness:
Chapter 5: Animal Consciousness
What this chapter is about: Which animals are conscious, and how can we tell?
I am sure Beau, my pooodle, is conscious - he is aware. I am less certain that he is self-aware, but I think he is. What about a fish? A worm?
I have written a blog about . Existential concerns are limited to humans. Beau doesn't have a phobia about death (I think); I do.
The evolution of consciousness
At some point - we don't know when and probably never will - some animals started being conscious. Were trilobites conscious? We should remember that we think of consciousness as being on a continuum, so at first some animals started being a little bit conscious. The emergence of self-awareness is more dramatic: at some point a few million years ago some animals started thinking about themselves and their consciousness.
What is it like to be - an octopus?
The classic question is asked in the American philosopher Thomas Nagel's famous (1974) paper, What is it like to be a bat? The question is asked of bats because most would argue that they are conscious, but their consciousness must be very different from ours, because their perception makes so much use of echolocation.
However, bats aren't really that different from us. We might not be able to say exactly what it is like to be a bat, but we have some idea. More alien is the octopus, and now Nage;'s classic question might be more interestingly formulated as What is it like to be an octopus? An octopus is highly intelligent, but has a very different neural anatomy from mammals, with their "brains" distributed over their bodies.
The word umwelt is used in phenomenology to describe the world as envisioned from the point of view of an animal and as experience by it.
Godfrey-Smith, P. (2017). Other minds: The octopus and the evolution of intelligent life. London: Collins.
Seth, A. (2021). Being you. London: Faber & Faber.
Many animals clearly have dreams. I can sometimes tell when Beau is dreaming: he's rigid, his eyes are moving rapidly under their lids, and he sometimes snuffles and makes noises. I have no idea what he dreams about; happy walks, good sniffs and large chickens, I hope. I assume his dream content is related to his waking experienc in much the same way human dream content is related to our waking experience. I do wonder though what he makes of his dreams. When I wake I know I've been dreaming (except in a few very rare instances where I'm dreaming I'm awake or whatever). My self-awareness, reasoning, and meta-cognitive skills all make it easy for us to tell what is dream and what is reality. I doubt if animals have this skill. For them consciousness of reality and dreaming must be all jumbled. I don't like the idea of Beau having a dog nightmare and then thinking it was real. Of course this is all speculation on my part.
In the news
Cephalopods feel pain
On the and elsewhere in June 2021. An octopus is intelligent, sentient, and feels pain, and should be protected by the Animal Welfare (Sentience) Bill - even though they're invertebrates. Just because these animals process information in a different way from us, and lack a single brain, doesn't mean they are incapable of feeling pain - for the orginal Conservative Animal Welfare Foundation report. I'm surprised that anyone who knows anything about octopuses (and crustaceans including lobsters) would think otherwise.
Crook, R. J. (2021). Behavioral and neurophysiological evidence suggests affective pain experience in octopus. IScience, 24(3), 102229.