"Transhumanism" refers to a wide array of inter-related commitments, but here I am concerned with the assumption that, in the future, we will transcend our biology by "uploading" our consciousness onto computer hardware. While this is a beautiful idea, as I shall argue, it won't happen. ---- Lieutenant Commander Data from "Star Trek: The Next Generation" seems to represent a future stage of human evolution. His brain is positronic - not biological. As such, he is free of the kinds of biological constraints we have, including degradation and eventual brain death. As technology progresses exponentially, we might think and hope that we can become more like him. Indeed, some think that this is inevitable and will happen in our lifetime. If we are to be like Data, it must be possible for non-biological hardware to run our mental software. Given the advances in Artificial Intelligence, we might think it is only a matter of time before this happen