Originally Posted by
Dodo25
I wasn't referring to your claim about killing for food (but I still don't agree with it), I was referring to 'chosing what to eat being a morally irrelevant issue'.
The theory of consciousness that makes the most sense to me doesn't require the 'quantum level'. I'm a bit surprised that you'd think bacteria might have consciousness... I'll just give you a list that's grounded in empirical facts and experiments on consciousness in animals and possibly other beings. For what it's worth, I have read a couple of philosophical and scientific books on these issues because it interests me and I consider it a highly relevant question for ethics. So here the list:
Category A: Rationality
Mentally healthy humans (out of the baby / little children age)
Category B: Self-Awareness
Humans (older than infant-age, mentally more or less healthy), chimpanzees, possibly other great apes; maybe though less likely: dolphins, whales, elephants...
Category C: Consciousness
Humans (all of them except forever comatose ones, or dead ones), all mammals, birds, reptiles, fishes. Possibly arthropods.
Most definitely not: Bacteria, protists, fungi, plants.
So what do these categories mean?
First of all, they don't have to be black-white, sometimes there are gradual differences. A fetus isn't self-aware, a six year old definitely is. Somewhere in between self-awareness emerges gradually.
A isn't very relevant, rationality is only needed for getting things like 'the right to vote' or 'the right for education'. It might even be considered a bad thing because it gives us responsibility. A lion can't choose whether he cruelly kills a gazelle. We can.
B is highly relevant when it comes to killing. Since non-suicidal beings of category B have a strong interest to live, killing them is wrong, even if done painlessly while they're sleeping.
C is highly relevant when it comes to suffering. Suffering is bad, that should be obvious to anyone. No being should suffer if it can be avoided.