you're an idiot then who hasn't ran into these problems before. you'll need to explain to me how a brainless jellyfish or shellfish are now excluded from your definition of animals with feelings because the boundaries you've drawn for plants includes them too. there is as much evidence that plants have physical touch as anything else. that isn't argued by anyone. you can't come up with a definition of 'sentience' or consciousness, because no one has managed to without running into massive problems as i've pointed out already either itt. incidentally, 'pain' isn't quite as simple a thing to define either, for example, when someone is under general anesthetic they still feel pain. there's a debate about how significant that is and if the person just doesn't remember it after an operation for example. in the olden days operations were performed on babies without anesthetic under the belief that they didn't feel pain by the way. the belief at the time was that their brain wasn't developed enough to feel it.
Tree Hugger