The Thomas Riker argument for body-soul dualism There is only the Body. Mind is a fiction constructed over time and stored in memory, having the effect of displacing Reality, but not replacing it with a new reality. So, when an organism like Riker is duplicated, although the same fictional narrative is superimposed to date, the Organism, that is the Real Riker remains the same, and the duplicate is a twin. If both were given the choice to kill the other or die, subject to their ethics, both would exercise the same drive to live and choose the other’s demise. Neither would be comforted by, "oh, well, the story lives on," and yet, that seems to be the very thing we cling to. The desire to keep the narrative "alive" and dismiss the organism is the same folly which has gotten us into this mess over what is Mind, in the first place.
A simplistic start: sensation and the natural drives, which may be summed up as the drive to live and multiply, and its aware-ing by the body is real activity involving the real consciousness of the human Organism. Perception is an activity restricted to human Mind wherein what is sensed is seized by Language, and, by forming attachments to other Language structures, converted into meaning which meaning is not derived from Reality, but constructed by these attachments, and thus, ultimately, fictional.