Scientism is this belief that any and all information, facts, and phenomena are ultimately reducible and can be expressed in the form of science. And, closely related, anything which is not reducible to physics, chemistry, or biological investigation, is not a legitimate area of pursuit. Science does not equal scientism.
The field of the paranormal, at least as far as ghosts are concerned, inherently deals with this realm we call the spiritual, in which spirits exist, sometimes detected but often undetected by human beings.
The question is then whether this spiritual realm can be documented by science, or whether it follows the path of mysticism and exists by definition beyond the realms of physical experience. The question is whether what we experience as paranormal phenomena (moving objects, voices, apparitions) are themselves spirits appearing, or are manifesting from a spiritual realm into this physical realm.
If the latter is the case, then our science can only go so far, can only measure the manifestation, and never reach the source itself.
But if indeed we, as human beings, carry some kind of soul or connection to the spiritual, then it’s through spiritual pursuit that will get us closer to the source, these entities that we pursue.
Which isn’t then to say we should stop pursuing science. Science will lead us to new discoveries, we’ll push at that edge of the veil, we’ll be able to find proof of the manifestation.
But we should stop the scientism.
We should stop condemning people for going on investigations for personal enjoyment, for trying devices that have no real “scientific” value (or even sense), for not using a row of technical devices connected to computers. Stop all the bickering and stay open minded. And smart.