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

I'd say there is a fair amount of effort to explore potential counter-evidence. For example, if AI is real - i.e. if we can construct machines that are conscious (or maybe we already have) then that seems to rule out psi, at least for me.

That particular avenue seems to depend on a very particular definition of consciousness. For example, what if a primary requirement of consciousness was the ability to at least occasionally demonstrate psi?

Certainly for me, one of the big kick-starts in the exploration of consciousness as distinct from either material or cold mathematical logic was the observation in my own life of events which were neither.