Well that's the question of solipsism. You don't know that I'm conscious and I can never prove it. However, I can offer you a reason to believe I am conscious,

Well that's the question of solipsism. You don't know that I'm conscious and I can never prove it. However, I can offer you a reason to believe I am conscious, which is that my brain is very similar in structure to yours. That's not conclusive evidence, but it might be enough to persuade you.