>>Then, how can you, yourself, know that what you feel as pain is what other humans feel? You aren't them. They aren't clones of you.
So, you don't know this, therefore your own nutjob logic says that humans other than yourself don't feel pain.<<
But I AM human. I am NOT a cat. And humans were made in God's image (hint: it doesn't mean just physical). Cat's are, by definition, a natural resource.
Irrelevant. You can only know what you, yourself, feel. Your notions about why animals don't feel pain must logically include all beings other than yourself.
P.S. - Has the Rover passed anywhere near your location on the planet Mars?