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Originally Posted by Martian
In function, fish nerves are the same as human or chimpanzee or crab or lion nerves. Or the ones in earthworms, for that matter.
Wow, an earthworm must be an intelligent creature with a personality that feels pain, just like us!
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i think we can safely say that earthworms and / or fish don't have personalities in the way human persons do and that they can't experience psychological or emotional pain, but they would find some experiences physically undesirable, which, due to their biology, would compel them to avoid those experiences, in the same way a newborn human infant would recoil from such experiences.
so the question is whether human satisfaction should outweigh physically undesirable experiences of non-persons. or at least earthworms and fish. but we would still draw the line somewhere, and for most people, that line is arbitrary. for example, you might be ok with slaughtering 10 million cows to satisfy human desires but not 10 million dogs...?