Things are going bump in the night.
Unidentifiable noises can be heard from unoccupied bedrooms.
A strange odour is in the air.
These are all unexplainable phenomena deserving of investigation.
If nothing conclusive is found e.g. a rotting rodent, loose floorboards etc they remain ‘unexplained’
They can’t simply be automatically ‘explained’ away by talk of ghosts, curses etc.
The unexplained can’t be explained away by something that is further unexplained.
Why can’t people who believe in crap like ghosts use their frontal lobes a lot more?