Sharon Hill via The Huffington Post
Paranormal investigators say they look for evidence of paranormal activity. That phrase always confounded me. I don’t quite get it. What does it mean when someone says they have evidence of “paranormal activity”? And, how do you know it’s not normal activity that you just couldn’t ferret out?
There is a problem with how the word paranormal is used because it is often utilized in a way that is perhaps not consistent with the original intent.
Language evolves. Let me take a shot at unpacking some of these definitions about unexplained phenomena. See if it makes sense.
“Paranormal” and other terms for strange goings-on have changed over time. The word paranormal was coined around 1920. It means “beside, above or beyond normal.” Therefore, it’s anything that isn’t “normal” — or, more precisely, it is used as a label for any phenomenon that appears to defy scientific understanding. Ok, right there is a tripping point. Whose scientific understanding? The observer who is calling it “paranormal”? If so, that is problematic as a theoretical physicist sees things a lot differently than a dentist or a police officer. So, it appears too subjective to be precise. Each person may have their own idea of what constitutes “paranormal activity”.
The term “paranormal” used to just mean extrasensory perception and psychic power but, since the 1970s in particular — thanks to TV shows and proliferation of the subject in popular culture — the term expanded in scope to include all mysterious phenomena seemingly shunned by standard scientific study. It was a convenient way to bring many similarly peculiar topics under one heading for ease of marketing. So today, it can include everything that sounds mysterious: UFOs, hauntings, monster sightings, strange disappearances, anomalous natural phenomena, coincidences, as well as psychic powers.
Not everyone agrees that fields of study such as UFOlogy or cryptozoology (Bigfoot, Loch Ness Monster and the like) should be considered paranormal but, if we think about the fact that after all this time, we have yet to document what these things actually are, that is beyond normal. Therefore, paranormal (arguably).
What appears as paranormal could essentially one day become normal. This has happened before with meteorites and still mysterious but likely explainable earthquakes lights and ball lightning. Or, we might not have developed the right technology or made the philosophical breakthrough yet to provide an explanation for some seemingly paranormal events. Perhaps we may find an instrument that can measure whatever it is that results in “hauntings” of a particular type. (Notice that I didn’t say an instrument that detects ghosts — an important distinction.)
Contrasted with paranormal is “supernatural.” To say something is supernatural is to conclude that the phenomenon operates outside the existing laws of nature. We would call such phenomena . . .

Whether they are supernatural or not, curses can have powerful, devastating effects
People who were primed to feel like they have little control over their lives were more likely to change their individual views and believe in supernatural or paranormal beings, a new study suggests.
James Randi, a.k.a. The Amazing Randi, magician and author of numerous works skeptical of paranormal, supernatural, and pseudoscientific claims has for about ten years offered “a one-million-dollar prize to anyone who can show, under proper observing conditions, evidence of any paranormal, supernatural, or occult power.” His rules were little more than what any reasonable scientist would require. If you are a mental spoon bender, you couldn’t use your own spoons. If you claimed to see auras, you’d have to do so under controlled conditions. If you claimed to be able to do remote viewing, you wouldn’t be given credit for coming close in some vague way. If you were going to demonstrate dowsing powers, you would have to be prepared to be tested under controlled conditions. If you were going to do psychic surgery or experience the stigmata, you would have to do so with cameras watching your every move.