Someone who's into this kind of thing answer me this:
Say some "Music Man" type huckster comes to your town with a "Brain Uploader" device. He promises to upload your brain to the metaverse, but all the device does is train a deep learning simulation of the victim's personality shown on a screen, while administering progressively great electric shocks on the victim until he's dead.
This gives the town the illusion that the person's soul (or consciousness, or whatever) has migrated into the metaverse. How do you detect he's lying?
Say some "Music Man" type huckster comes to your town with a "Brain Uploader" device. He promises to upload your brain to the metaverse, but all the device does is train a deep learning simulation of the victim's personality shown on a screen, while administering progressively great electric shocks on the victim until he's dead.
This gives the town the illusion that the person's soul (or consciousness, or whatever) has migrated into the metaverse. How do you detect he's lying?