I think it comes down to what kind of evidence one accepts. By all external indicators it is doing what humans do in many ways and we grant humans an exception

I think it comes down to what kind of evidence one accepts. By all external indicators it is doing what humans do in many ways and we grant humans an exception to having to prove that they have an internal state apart from ours that experiences things like we do. Some people would confer the benefit of the doubt on another system claiming that it does, while we have no evidence that it does, because by saying it is wrong about itself we make an exception for ourselves without even being about to define what it is about ourselves that cause us to experience what we do.