We don't even know how to disprove that this statement with "AI" replaced by "other humans" other than by listening to people self-reporting and taking their word for it and/or defining the words in ways that do not rely on a subjective experience.
Until we know how to objectively measure if someone or something is conscious, it seems unreasonable to make statements with any kind of certainty about it.
Until we know how to objectively measure if someone or something is conscious, it seems unreasonable to make statements with any kind of certainty about it.