@manored,
manored;110353 wrote:Is consciousness really relevant? after all, how to even define it? When we can tell someone is conscient? Is a dog, a pig, a dolphing, conscient?
I think that ability to feel pain is not really a good reference. Then, can we kill a person nobody knows if we do so painlessly?
Consciousness is of course relevant. If something is not conscious it needn't be given respect as an individual. Should a stone or a plant be given respect? Is it immoral to harm a statue or a fungus? What about microbes?
How to detect consciousness has been a subject of great dispute. The mirror test is inuitively attractive; if something recognises its reflection as a reflection of
itself it must have some kind of self-awareness. However, negative results are difficult to interpret in this test. The delay test is also an appealing method.
Only a handful of species pass the mirror test. Not even human infants pass it. Dolphins, apes and elephants do, as do magpies.
I think the ability to feel pain (and possibly pleasure) is the only reference for morality. If no one could suffer, what would be the point? Would it be necessary to respect anyone if you couldn't possibly harm them?
Killing an unconscious, anonymous human would not be moral if they could have been revived. If not, perhaps the unpalatable conclusion is that, yes, we can kill them. It is thankfully unlikely to encounter such a situation in real life, however.