system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40k] Is the Emperor alive, dead, both and bouncing between the two every day until he gets a fresh batch of Psychers? Would Ork Weirdboyz suffice as a source of sacrifice for big E? Could he sustain himself with the Warp/Chaos Undivided energies?
gpt
The Emperor is alive, to suggest otherwise is heresy.

The best evidence for this is the Astronomicon, which has been sustained without interruption for millennia.  If the Emperor were bouncing between life and death, so too would the astronomicon.  The mass sacrifice of psykers sustains him like nutrigruel and carboloaf sustains a soldier, but we do not think of getting hungry as "dying" and eating as "living."  Feeding the Emperor a diet of foul Xenos would be as harmful to him as a guardsman ingesting whatever it is the Xenos eat.  >!Some of the novels say this is possible.  Especially Eldar food!<

The mere suggestion of him eating Chaos is heretical.  >!Although he probably does draw on the power of the warp for sustenance.!<