This is Philosophy Bites with me, David.
Edmonds and me, Nigel Warburton.
Philosophy Bites is available at www.philosophybytes.com.
nobody doubts that dogs and cats feel pain.
But what about goldfish or squid or bees?
The question of which animals are sentient is of enormous importance, not least because it should surely influence how we treat them.
Jonathan Birch, a philosopher at the London School of Economics, has been leading a project investigating animal sentience and the ethical status of animals.
Jonathan Birch, welcome to Philosophy Bites.
Hi Nigel, thanks for inviting me.
The topic we're going to focus on is the edge of sentience.
Just before we get to the edge, what is sentience?
It's good to start by thinking about pain and pleasure.
Ask yourself questions like can an octopus feel pain?
Can a crab?
Can an insect?
What about a spider?
In fact, I think it's good to have a concept that is a bit broader than just pain and pleasure.
A concept that captures any experience that feels bad or feels good.
Any experience with a positive or negative quality.
That includes pain and pleasure, but it also includes things like joy, excitement, stress, boredom, comfort, discomfort.