Is the Filter Theory committing the ad hoc fallacy and is it unfalsifiable?

does nothing to overthrow all of neuroscience, which finds that the mind is dependent on the brain, and hence is unlikely to survive death.

It says no such thing.  It simply observes certain correlations and, again, only those it CAN observe presently.

This is dogma Merle; plain and simple.

EDIT: I see Brian already made a similar observation.  Still, I'll leave mine here as I find this to be THE singular barrier to this being anything close to a productive conversation.