If reaction to physicals damage is enough to qualify as pain, a brick wall feels pain. If you damage it, it will start having holes, and eventually fall over completely.
I think at the very least you’d need some kind of learning. Pain is the stuff you learn to avoid and pleasure is the stuff you learn to do more. Without that, it’s impossible to say whether an instinctive response to stimuli is a negative or positive feeling.
If reaction to physicals damage is enough to qualify as pain, a brick wall feels pain. If you damage it, it will start having holes, and eventually fall over completely.
I think at the very least you’d need some kind of learning. Pain is the stuff you learn to avoid and pleasure is the stuff you learn to do more. Without that, it’s impossible to say whether an instinctive response to stimuli is a negative or positive feeling.