Mr Purple, thanks for your reply.
I won’t address everything you said, as you’ve made some good points, as have others, and I do have a lot to think about. I just wanted to talk about one thing you wrote, because it really surprised me.
Why do you care whether the creature can contemplate life? I fail to see the moral significance of that.
To me the idea that complex thought makes a difference was a self-evident truth, I hadn’t even considered that others may disagree.
As an example of why I believe this, I have a medical condition which used to cause me episodes of acute pain. I can’t stress enough that the physical pain was severe, but I actually feel that the fear was the worst part. Fear of the life I would miss out on if I died, fear for my friends and family if I died, fear that the pain would get worse before it got better – all a result of the fact that I was aware of the cause of the pain and the specific risks that I faced.
Another example – what’s worse, a medical injection or a spider bite? They might hurt equally on a purely physical level, but I think most would agree that a spider bite was worse, if say, you didn’t know if the spider was venomous, or perhaps if you didn’t even see what bit you and didn’t know what it was.
For all we know, the fact they can't mitigate that pain with coping mechanisms may make their suffering more intense than a human.
That’s a good point, and a good counter argument to what I’ve just said. I guess the point is that we just don’t know.
I don’t want to give up something so important to me (and I’m not going to explain again that it’s not simply about the taste of meat compared to the taste of vegan food – something vegans just don’t seem to get) without knowing for sure that it’s morally necessary. But I don’t think it’s possible to know for sure until science can tell us more about what animals are thinking and feeling. That’s not going to happen immediately, and so until then the decision I face is between potentially giving up/significantly changing my life’s passion unnecessarily, and living with the possibility that I am responsible for incalculable pain and suffering.