@SnareStyle10,
I believe that Descartes was correct. after all, when he stated "i think, therefore i am.", i interpret this as a state of consciousness , and self awareness. because of that, any machine that can monitor itself "is". although another point you could mention, "what about those with brain damage?" or vegetables. they exist, and have sentimental value to their family, but do they think? or, perhaps, they think in a way that we have not detected. but then, he could have referred to the afterlife. if, after we die, we have no consciousness, then, we do indeed, not exist.